PERIODIC TABLE
1
Audio Transcript Auto-generated
- 00:01 - 00:04
Hi, I am eating role from Tom Be for my
- 00:04 - 00:05
chemistry yearly project.
- 00:05 - 00:08
I want to talk about history of the periodic table.
- 00:09 - 00:12
In my you know project I have two parts.
- 00:13 - 00:16
These are what's the period table part and the historic
- 00:16 - 00:21
part. Firstly, I will briefly talk about the periodic table
- 00:21 - 00:27
features. When we look at the definition of the periodic
- 00:28 - 00:30
table, we can see that periodic table is a table
- 00:30 - 00:34
of the chemical elements feature organized by atomic number from
- 00:34 - 00:38
the element It loves atomic number, which is the hydrogen
- 00:39 - 00:41
to the element with the highest atomic numbers.
- 00:44 - 00:47
Period is a horizontal rows in the periodic table and
- 00:47 - 00:50
it signifies the total number of electron shells.
- 00:50 - 00:53
For example, then we look at the lithium elements.
- 00:54 - 00:59
It has two electron shells and it's located in the
- 00:59 - 00:59
second period.
- 01:00 - 01:08
In the periodic table group is the vertical column in
- 01:08 - 01:11
the periodic table and signifies the number of valence shell
- 01:11 - 01:12
electrons in an atom.
- 01:13 - 01:15
There are seven groups in the periodic table.
- 01:17 - 01:17
You can see diagram.
- 01:23 - 01:25
Then they look at the families, we can see that
- 01:26 - 01:30
there are al Qaeda metals or login family, alkaline, earth
- 01:30 - 01:33
metals, the Baron family and the carbon family.
- 01:33 - 01:34
The oxygen family intelligence.
- 01:36 - 01:39
Also the novel gazes uh in the periodic table.
- 01:43 - 01:46
Now I want to talk about the history of the
- 01:46 - 01:47
periodic table.
- 01:48 - 01:51
Firstly in 1649, Hennig brand discovered phosphorus.
- 01:52 - 01:55
Uh you can see his picture on the side.
- 01:55 - 01:58
He's a German merchant and the pharmacist in his life.
- 01:59 - 02:02
He generally lives in Hamburg and as as I said,
- 02:03 - 02:05
he is known for the discovery of phosphorus.
- 02:07 - 02:08
What is the first periodic table?
- 02:09 - 02:12
First periodic table called terrorists Alex because of its shape.
- 02:13 - 02:16
Uh and also elements tell a room came in the
- 02:17 - 02:21
middle of this cylindrical shape and he ordered the elements
- 02:21 - 02:23
according to atomic base on the surface of the cylinders.
- 02:24 - 02:28
You can see the uh table off the Talarico Alex.
- 02:32 - 02:34
Let's look at the Water Mayors periodic table.
- 02:35 - 02:38
This table is different than the others because he was
- 02:39 - 02:42
the first person to recognize the periodic trends in the
- 02:42 - 02:42
properties of elements.
- 02:43 - 02:48
And also he made a graph with uh that he
- 02:48 - 02:51
shows the pattern in that important of an element well
- 02:52 - 02:53
against its what atomic.
- 02:53 - 02:57
Right In this periodic table, there are 28 elements.
- 02:58 - 03:02
Also, he was a german chemistry professor in University of
- 03:02 - 03:03
Tubingen in Germany.
- 03:03 - 03:04
He was the first one.
- 03:07 - 03:10
When you look at the discovery of the navel gazes,
- 03:11 - 03:15
William Ramsay discovered that and he discovered for gazes, these
- 03:15 - 03:17
are neon argon krypton zone.
- 03:18 - 03:21
He showed that they formed an entire family of new
- 03:21 - 03:23
elements and they are called noble gazes.
- 03:24 - 03:26
Um beating discovery.
- 03:27 - 03:29
He won the Nobel Prize in 94.
- 03:31 - 03:34
You can see him on the right side of the
- 03:35 - 03:41
presentation. Henry Moseley realized that an element is defined by,
- 03:41 - 03:42
by its number of protons.
- 03:43 - 03:46
This is very important for our new and modern version
- 03:47 - 03:47
of the periodic table.
- 03:48 - 03:52
Also he arranged the elements in the periodic table by
- 03:52 - 03:55
their number of protons instead of their atomic weights.
- 03:56 - 04:00
This was very important discovery for the development of periodic
- 04:01 - 04:12
tables. John Deborah Recognized creates soft elements in 1879 and
- 04:13 - 04:18
also he said they have chemically similar properties.
- 04:19 - 04:23
Also she he showed that properties of the middle element
- 04:23 - 04:26
could be predicted from the other members of the trades.
- 04:26 - 04:31
For example, we can predict chemical properties of the sodium
- 04:31 - 04:35
by looking at other elements virtual reality.
- 04:35 - 04:37
Um And protesting.
- 04:41 - 04:41
Do you want your mommy?
- 04:42 - 04:46
Huh. He is considered to be the father of the
- 04:46 - 04:49
periodic table because of his important discoveries.
- 04:51 - 04:55
He organized a periodic table elements according to their atomic
- 04:55 - 05:02
mess and um he organized them into columns also based
- 05:02 - 05:03
on chemical and physical properties.
- 05:04 - 05:08
Also, he's a Russian chemist and he lived from 1834
- 05:09 - 05:10
to 197.
- 05:14 - 05:19
Ernest Rutherford and Hands kicker discovered that electrons move around
- 05:19 - 05:20
the nucleus of the size of the top.
- 05:21 - 05:25
You like that our model to the solar system and
- 05:25 - 05:29
according to this model, electrons orbiting around the heavenly close.
- 05:29 - 05:35
This was very important discovery, both for new version of
- 05:35 - 05:38
periodic table and also the idea of the new collage
- 05:39 - 05:40
model of the atom.
- 05:41 - 05:44
You can see the model on the right side.
- 05:47 - 05:51
Glancy Bourke discovered plutonium and transferring elements which are from
- 05:52 - 05:57
94-1 other than to these findings are the latest change
- 05:57 - 05:58
for the periodic table.
- 06:02 - 06:05
Now we are done with the history of the periodic
- 06:05 - 06:09
table and I want to show My references for my
- 06:09 - 06:10
camp 300 project.
- 06:10 - 06:11
Thank you for listening.