Download "Закономерность изменения свойств элементов в периодах и группах. 10 класс."
%3Aformat(webp)%2Fi.ytimg.com%252Fvi%252FYJ3k5SG4yM4%252Fsddefault.jpg&w=1139&q=75)
Please wait. We're preparing links for easy ad-free video watching and downloading.
Similar videos from our catalog
%3Aformat(webp)%2Fi.ytimg.com%252Fvi%252F-3VTTR1O9Gk%252Fmaxresdefault.jpg&w=1139&q=75)
%3Aformat(webp)%2Fi.ytimg.com%252Fvi_webp%252F1F96LSwWTpQ%252Fmaxresdefault.webp&w=1139&q=75)
%3Aformat(webp)%2Fi.ytimg.com%252Fvi_webp%252FOrn3PAjJXDw%252Fmaxresdefault.webp&w=1139&q=75)
%3Aformat(webp)%2Fi.ytimg.com%252Fvi_webp%252FS4LZlsSe5AQ%252Fmaxresdefault.webp&w=1139&q=75)
%3Aformat(webp)%2Fi.ytimg.com%252Fvi%252FYuoaWVXm9Eg%252Fmaxresdefault.jpg&w=1139&q=75)
%3Aformat(webp)%2Fi.ytimg.com%252Fvi%252Faot4hJxKRAY%252Fmaxresdefault.jpg&w=1139&q=75)
%3Aformat(webp)%2Fi.ytimg.com%252Fvi%252Fct4GPra3ziU%252Fmaxresdefault.jpg&w=1139&q=75)
%3Aformat(webp)%2Fi.ytimg.com%252Fvi%252FehLF5pCCuY8%252Fmaxresdefault.jpg&w=1139&q=75)
%3Aformat(webp)%2Fi.ytimg.com%252Fvi%252FlWmh8XZL8kc%252Fmaxresdefault.jpg&w=1139&q=75)
%3Aformat(webp)%2Fi.ytimg.com%252Fvi_webp%252FzqzC4FXKg0w%252Fmaxresdefault.webp&w=1139&q=75)
Video tags
Subtitles
Russian
00:00:04
hello guys my name is00:00:07
Tatyana Belousova gen-1 I am a chemistry teacher today we00:00:11
will find out how the properties of00:00:13
elements and their compounds change in the00:00:15
periodic table,00:00:17
but initially I would like to remind you of00:00:19
this aspect00:00:20
when Dmitry Ivanovich Mendeleev00:00:22
created his table and at that time the00:00:25
structure of the atom was still it was unknown00:00:28
in detail and00:00:30
Mendeleev died and I don’t know how it is00:00:32
structured there as a whole, this is the picture00:00:34
that you now imagine00:00:37
and initially the elements were arranged in00:00:40
his tables in increasing relative00:00:43
atomic mass and valency, but when00:00:47
Midi leev arranged the elements from the first00:00:51
to the 63rd atomic number in at that time there were00:00:54
so many elements discovered, then he,00:00:57
like other scientists, encountered one00:01:00
of the problems00:01:01
when he reached the 18th serial number00:01:04
and when the element argon was already discovered,00:01:07
it was discovered that its mass was greater than that00:01:11
of kohl and kalle should have been00:01:15
in the place of argon organ according to00:01:17
the place if and you know, if such a00:01:20
rearrangement that De Lev and other scientists made to me00:01:22
was the only one, then00:01:25
one could remember that this was some kind of00:01:28
exception, it turned out that there are00:01:30
quite a lot of such rearrangements now00:01:32
they do not surprise anyone with the periodic00:01:35
system and Mendeleev and other scientists00:01:39
reasoned so the organ should be exactly on the00:01:42
eighteenth order in the number because00:01:44
it is an inert gas in the form of alkali00:01:47
metals, it has no place, and potassium,00:01:49
accordingly, should be in the00:01:51
family of alkali metals and,00:01:53
accordingly, in the environment of inert gases, there00:01:55
should also be no place for it, so the00:01:59
rearrangements made it possible to formulate a00:02:02
periodic law with a change that00:02:05
concerns precisely these aspects,00:02:08
the original Mendeleev formulated the00:02:10
periodic law as follows:00:02:12
the properties of elements and their compounds00:02:14
are periodically dependent on the00:02:18
relative atomic masses, or at that00:02:20
time this mass was called a huge weight,00:02:23
but due to rearrangements,00:02:25
the formulation has changed and in the end00:02:27
now it sounds00:02:28
dependent on periodic dependence on the00:02:32
increase in the charge of atomic nuclei and00:02:36
so the periodic system are a00:02:38
reflection of such special moments.00:02:43
Now let’s find out what changes in the00:02:45
periodic system. Firstly, let us remind you00:02:48
that the elements we are talking about in the00:02:52
table are conditionally divided into 2 groups:00:02:54
metals and non-metals;00:02:58
metals are simple substances substances00:03:01
have a solid state of aggregation, except for00:03:04
mercury, they are usually gray in color, with the00:03:07
exception of copper and gold, they are plastic,00:03:09
electrically conductive, but non-metals,00:03:12
on the contrary, they are not, different colors, different00:03:15
states of aggregation, they are usually00:03:17
fragile and do not conduct electric current and heat,00:03:20
now metal tends to00:03:23
give up electrons and to the mental and on the contrary,00:03:27
they tend to accept them, therefore the behavior of00:03:30
metals and non-metals is00:03:32
opposite,00:03:33
for example, if we take the metal magnesium, it is00:03:36
not profitable for the metal to give up 200:03:38
electrons, but if we take the element sulfur, then there are00:03:41
just two electrons and00:03:43
it is necessary to accept this and this explains00:03:46
the fact that metals and non-metals are different00:03:48
interact with each other the next important00:03:51
aspect is the radius of an atom the00:03:56
radius of an atom is this value showing00:03:59
what size it has and there but based on the00:04:02
assumption that the atom has a rounded00:04:04
shape then the radius of the atom is a parameter00:04:07
that is usually compared for elements00:04:10
the following parameters that you often00:04:12
compare for an element is the00:04:15
value that is ionization energy,00:04:22
this term is new to you, it is00:04:26
denoted by the letter g and is measured in00:04:29
kilojoules per mole,00:04:33
ionization energy00:04:35
is the energy that must be applied00:04:37
to tear off an electron from it,00:04:44
then the particle and the atom passes through the00:04:46
waves with a charge, plus this is what the dependence looks like,00:04:51
ionization energy, then with its00:04:54
formal expression then there is another00:04:58
quantity called electron00:05:03
affinity electron affinity00:05:07
which is usually denoted by the symbol00:05:12
energy as is customary00:05:14
and electron affinity is written in00:05:16
abbreviation what is energy00:05:19
electron affinity is the energy that is00:05:22
released or absorbed if an atom00:05:25
captures an electron and so if it00:05:28
captures an electron then it it goes into00:05:31
it with a minus charge and at the same time the electron affinity00:05:34
energy can be released or absorbed;00:05:38
it will be released if it is00:05:41
beneficial for the atom and it will be absorbed if the00:05:44
electrons are00:05:45
not beneficial for the atom for some reason, but00:05:48
returning to metals and non-metals, I00:05:50
can say metal it is unprofitable00:05:52
to take electron, which means for them00:05:54
this process will have a minus sign,00:05:57
electron affinity energy,00:05:59
but for non-metals, on the contrary, it is beneficial,00:06:01
so they will have a plus sign, this is the00:06:04
energy of electron affinity00:06:06
and there is another quantity that you are00:06:10
familiar with from the 8th grade course00:06:12
called electronegativity,00:06:18
which is denoted by the letter psi00:06:24
and electronegativity, it is00:06:29
a quantity that is the arithmetic mean00:06:34
1 2 of the sum of the00:06:37
energy of nization and electron affinity energy,00:06:41
therefore it is called00:06:44
relative and electronegativity, and00:06:47
so these parameters are usually compared for00:06:50
elements in the periodic system, and so00:06:53
we will find out how they will be in the periodic00:06:56
system, these patterns look like I00:06:59
'll designate the conditionally periodic system00:07:01
dogs let's remind you how00:07:05
the tables are structured firstly I would like to say00:07:08
that there are a00:07:10
huge number of periodic tables, today there are more00:07:12
than 400 of them known variants the first00:07:15
variant that was proposed by00:07:17
Mendeleev and which you see more often00:07:20
in lessons and perhaps in some00:07:23
printed publications this is called a00:07:26
short version of the table; such a table00:07:29
has, respectively, seven periods present00:07:32
tense and 8 groups, which means the period numbers00:07:35
are indicated by Arabic numerals, as00:07:38
a rule, but the group numbers00:07:40
are Roman numerals and there is a variant00:07:43
called semi-long or long00:07:46
version when the period numbers00:07:48
is also indicated by Arabic numerals,00:07:50
but the group numbers will00:07:53
also be reflected in Arabic numerals, that is, they are not00:07:55
shown in Roman numerals, and then the group numbers00:07:58
can be from one to 18, but in any00:08:01
table no matter what you see, and you00:08:03
can look on the Internet, you will see00:08:06
that the division of the table is all equally occurs00:08:08
in two parts and so in any table there are00:08:11
periods translations00:08:15
and in any table there are groups groups00:08:20
periods these are the types of elements that00:08:24
begin with an alkali metal and00:08:26
ends with an inert gas periods00:08:29
present time 7 the00:08:31
first and third periods from 1 to 3 periods00:08:35
are called small periods and with 4 and 7 each, and00:08:41
if there is an 8th period, they are also00:08:43
called a greater number of periods,00:08:47
maybe more, but you know, there are00:08:48
different options for the development of this, understand and00:08:52
there is a version of the table proposed by00:08:54
Japanese scientists who believe that the 8th00:08:57
period will still be the largest and the00:09:00
periodic table will be but there are about00:09:03
140 to 150 chemical elements of the group at00:09:08
present, I’ll explain once again00:09:10
if we are talking about a short version, then the00:09:13
groups go from 1 to 8 and then the00:09:18
group numbers are shown in Roman numerals or00:09:21
from 1 to 18 then the circle numbers00:09:25
are shown in Arabic numerals00:09:27
inside the group is subdivided and00:09:31
called the main thing is00:09:33
under the group under the ground00:09:36
a b in ordinary English both00:09:41
are the so-called secondary subgroup00:09:45
let's get our bearings in the table for00:09:47
some elements let's take an00:09:50
element with serial number 20 this is the00:09:53
element calcium it is in the fourth00:09:56
major period we can then00:09:57
say00:09:58
in the second group and the main subgroup00:10:01
therefore in the table it is indicated as the second00:10:04
group a00:10:05
or it will be in the semi-long version00:10:08
the second group then the number a may not00:10:11
be indicated, but for example iron iron is00:10:15
also an element 4 of the long period it00:10:18
is in the short version of the table 800:10:21
group b subgroup secondary subgroup a00:10:24
in the semi-length version then00:10:26
this will be the 8th group, but then the letters a and b00:10:30
may not be written. Now let’s find out00:10:33
how the parameters that we00:10:35
told you earlier change in periods and in00:10:38
groups, choose the direction in periods from00:10:41
left to right, group in top to bottom, and so00:10:45
first, let’s find out what00:10:47
will happen in periods decrease decreases and so there are00:10:57
metallic properties00:10:58
why is this so because metal00:11:01
tends to give up electrons,00:11:03
let’s take for example the elements of the third00:11:05
period, the first is sodium, it has00:11:08
1 electron on the outer level, it will00:11:11
easily give it up, the next one is00:11:13
magnesium, magnesium, two electrons to give away00:11:16
becomes more difficult, which means metallic00:11:19
properties will gradually decrease, but00:11:21
aluminum, which is next,00:11:24
will give up three electrons, which00:11:26
will be more difficult for it to do, then there are00:11:30
metallic properties in all periods,00:11:32
the only thing is that it00:11:35
happens more slowly, besides this, there is00:11:37
also the radius of the atom, it seems00:11:41
strange why this happens,00:11:43
but it happens compression of the atom and the00:11:47
greater the charge of the nucleus, the stronger the00:11:50
electrons of the outer level are pressed in00:11:52
and therefore the radius of the atom according to the period will00:11:56
decrease, what at this time the00:11:59
periodic system according to the period from left00:12:01
to right increases00:12:04
increases and so let’s return to our00:12:09
properties and so the ionization energy and,00:12:13
first of all, non-metallic properties00:12:15
I will start with them non-metallic properties00:12:17
why they increase because00:12:20
elements tend to accept electrons not as00:12:23
metals, this is more common,00:12:25
but here you need to remember this feature00:12:27
that this change will occur00:12:30
up to the penultimate element00:12:32
because the final elements in the table00:12:35
are inert gases that do not tend to00:12:39
accept electrons as well as giving them00:12:41
further, the second parameter is the ionization energy,00:12:46
that is, the ability to give up electrons,00:12:49
the easier00:12:50
it is to do this, the correspondingly00:12:53
less energy will need to be applied and,00:12:57
accordingly, the more difficult it will be to00:12:59
do this, respectively, it will be greater,00:13:01
so the ionization energy will00:13:03
increase and it will be more difficult to tear off electrons00:13:07
will be all those00:13:08
all about the same inert gases and non-metals of00:13:11
7 groups, and in addition to this, the00:13:14
energy of electron affinity increases,00:13:18
why this will increase00:13:20
because the easier electrons are00:13:24
accepted by an atom, the more energy00:13:27
will be released, respectively, the00:13:29
energy of electron affinity will also00:13:32
increase and in addition electronegativity will00:13:35
increase00:13:37
therefore, the most00:13:39
hector and negative elements00:13:41
are at the end of the period and also,00:13:43
accordingly, the strongest non-metals00:13:45
will be at the end of the period, just00:13:48
be careful with inert gases00:13:49
then, according to this distribution,00:13:53
questions should be clear to you, for example,00:13:55
what is the most metallic element in the00:13:59
fourth period, let’s look at this should00:14:01
be the most the outermost element is potassium,00:14:04
for example, which of the elements of the second00:14:06
period will have the largest atomic radius,00:14:10
then it will be the element leti, which00:14:13
also stands to the left00:14:15
in this period, which is the strongest non-00:14:18
metal,00:14:19
for example, in the third period it will be00:14:21
chlorine, which element of the third period00:14:24
will have the00:14:28
minimum energy in the third period it will be00:14:30
sodium and in the same way it will also have00:14:33
the lowest electron affinity energy00:14:36
electronegativity, now let's move on to00:14:38
our groups and so in the groups from above00:14:44
we will not have a decreasing decrease and so it00:14:50
will decrease accordingly and00:14:54
non-metallic properties means the00:14:58
strongest metals will be in the00:15:00
top parts of the table,00:15:03
accordingly, the00:15:06
ionization energy will decrease, the electron affinity energy will decrease00:15:12
and electronegativity will decrease, and00:15:16
what at this time will increase00:15:19
increases increases and so the00:15:25
metallic properties, but again00:15:29
here you need to remember one feature of the00:15:32
elements of the secondary subgroups, this00:15:35
parameter does not change so much noticeably00:15:37
happens even with a contradiction, for example,00:15:40
copper will have00:15:44
metallic properties that are more pronounced than the00:15:47
elements silver and gold, and the00:15:49
radius of the atom also increases,00:15:54
then taking this into account for group bans,00:15:58
such questions should be clear, and00:16:00
so let’s choose in the second group the main00:16:04
subgroup, for example, the most metallic element,00:16:07
let’s Let's see then in the second group,00:16:09
the main subgroup, this will be for the sake of00:16:12
further and which of the non-metals will have the most00:16:16
strongly expressed properties, let's say for group 600:16:19
it will be the element oxygen and,00:16:21
accordingly, the remaining parameters will00:16:24
change the same way, according to the00:16:26
periodic table you should00:16:28
understand what changes occur in00:16:30
table of how they are related to energies,00:16:34
there will be two new parameters for you00:16:36
today, we looked at them,00:16:38
ionization energy and electron affinity,00:16:40
the rest of the parameters that we looked at00:16:43
today, but your hands are also already familiar to you from00:16:46
8th grade, and therefore today we only00:16:48
deepened our understanding of these quantities,00:16:51
and so I hope that today, but00:16:54
all the information was clear to you in the00:16:57
next lesson, we will continue to study the00:16:59
periodic table, well, I’ll remind you of00:17:02
the tasks that I would like you to00:17:04
do, please look at the00:17:07
periodic table of different types, you00:17:09
will find many of them, many such00:17:12
tables and I hope that this is the same for you it will be00:17:14
interesting but we say goodbye to you and00:17:17
see you again guys00:17:24
[music]Description:
🚩 Поддержать наш канал: https://destream.net/live/Education/donate Образовательный сайт: https://mektep-online.kz/ МЕКТЕП OnLine - образовательный проект! Татьяна Белоусова - преподаватель КГУ "Общеобразовательная школа №95". Для ВОПРОСОВ и ПРЕДЛОЖЕНИЙ: 📲 +7 701 302 78 94 💻 [email protected] Наши каналы: Математика: https://www.youtube.com/channel/UCIIzV1CL8Gdt9FLJGfceejw?view_as=subscriber Геометрия: https://www.youtube.com/channel/UCLTSnsgxIUWv2HdL2wp5YTg Физика: https://www.youtube.com/channel/UCQkg3Grp7cAuHTXIjTxaaiQ Биология: https://www.youtube.com/channel/UCiK0AUHBb5BYq0q0aolx3Lg?view_as=subscriber География KZ: https://www.youtube.com/@mektep_online_geografiya_kz География: https://www.youtube.com/@mektep_online_geografiya English: https://www.youtube.com/channel/UCn_iAUW9mqKBcXrwcUePHSg Arman Kids kz: https://www.youtube.com/@arman_kids_kz Arman Kids ru: https://www.youtube.com/@arman_kids Подпишись на нас ✅ 🚩 Instagram: https://www.facebook.com/unsupportedbrowser 🚩 Facebook: https://www.facebook.com/unsupportedbrowser?_rdc=1&_rdr 🚩 Вконтакте: https://vk.com/public191962382 🚩 TikTok: https://tiktok.com/@mektep_online_kz
Preparing download options
* — If the video is playing in a new tab, go to it, then right-click on the video and select "Save video as..."
** — Link intended for online playback in specialized players
Questions about downloading video
How can I download "Закономерность изменения свойств элементов в периодах и группах. 10 класс." video?
http://unidownloader.com/ website is the best way to download a video or a separate audio track if you want to do without installing programs and extensions.
The UDL Helper extension is a convenient button that is seamlessly integrated into YouTube, Instagram and OK.ru sites for fast content download.
UDL Client program (for Windows) is the most powerful solution that supports more than 900 websites, social networks and video hosting sites, as well as any video quality that is available in the source.
UDL Lite is a really convenient way to access a website from your mobile device. With its help, you can easily download videos directly to your smartphone.
Which format of "Закономерность изменения свойств элементов в периодах и группах. 10 класс." video should I choose?
The best quality formats are FullHD (1080p), 2K (1440p), 4K (2160p) and 8K (4320p). The higher the resolution of your screen, the higher the video quality should be. However, there are other factors to consider: download speed, amount of free space, and device performance during playback.
Why does my computer freeze when loading a "Закономерность изменения свойств элементов в периодах и группах. 10 класс." video?
The browser/computer should not freeze completely! If this happens, please report it with a link to the video. Sometimes videos cannot be downloaded directly in a suitable format, so we have added the ability to convert the file to the desired format. In some cases, this process may actively use computer resources.
How can I download "Закономерность изменения свойств элементов в периодах и группах. 10 класс." video to my phone?
You can download a video to your smartphone using the website or the PWA application UDL Lite. It is also possible to send a download link via QR code using the UDL Helper extension.
How can I download an audio track (music) to MP3 "Закономерность изменения свойств элементов в периодах и группах. 10 класс."?
The most convenient way is to use the UDL Client program, which supports converting video to MP3 format. In some cases, MP3 can also be downloaded through the UDL Helper extension.
How can I save a frame from a video "Закономерность изменения свойств элементов в периодах и группах. 10 класс."?
This feature is available in the UDL Helper extension. Make sure that "Show the video snapshot button" is checked in the settings. A camera icon should appear in the lower right corner of the player to the left of the "Settings" icon. When you click on it, the current frame from the video will be saved to your computer in JPEG format.
What's the price of all this stuff?
It costs nothing. Our services are absolutely free for all users. There are no PRO subscriptions, no restrictions on the number or maximum length of downloaded videos.