Lesson outcome: Introduction to the elements of the periodic table

good day and welcome to the introduction to the elements

of the periodic table Lesson for Grade seven Learners.

Mhm. Mhm.

This lesson is possible.

The periodic table.

Yeah. Looking into details what okay, assist often how it's

made arrangement.

So start by defining what a periodic table is.

So basically a periodic table is a classification system of

elements that makes up matter and material.

And the periodic table is made out of elements since

defended as a systematic classification of element.

So element pure substances that cannot be broken down into

simpler forms or they cannot be broken down into pieces.

The period of table was established or developed in the

18th century by a Russian chemist by the name of

Dmitri Mendeleev.

E. As you can see in the picture, this is

Dmitri Mendeleev who was a chemist.

This is a typical sketch of a periodic table.

Now a periodic table is categorized into three forms.

Yes, don't tolls.

Mhm. So yeah.

She colour indicating metals and orange color indicating non metals

and a purple color indicating metal Lloyd do.

Our metals constitutes about 75 of periodic table.

And they are located on left inside towards the right

hand side.

And while the nut mantles are found between our metals

and non metals, we have metal lloyds, as we have

mentioned before that the penalty table, it's an arrangement of

elements. This is a typical hydrogen element.

So an element is represented in this form in a

periodic table.

We have the element symbol which in our case is

the letter H.

Which stands for the element hydrogen And at the top

of the number one which is the atomic number of

our um our hydrogen element.

And at the bottom we have 1100 Age, which is

the atomic weight of the hydrogen atom.

Now the periodic table is made out of columns and

rooms. So it's column represents a particular group of elements

which share certain properties.

For instance, we have one element which are locally elements.

And then go to we have our other Cali metals

and on Group eight A.

We have a group of elements called noble gases.

In group seven we have a group of elements called

hello gines.

And between two room um Group five and 6 We

have non metals.

And then in blue web in yeah hello master dish.

Post transitional metals.

And between.

I'll call you at the mantles and transitional post traditional

metals. We have transitional metals which are fun In groups

in groups three b.

and groups 12 B.

And then at the bottom we have two rolls which

were previously mentioned.

That rose represents period in the first role we have

metals which are called at tonight and also.

But we're told me we have our land tonight now

in every group or the elements that belong on the

same group.

They share certain properties.

These properties can be melting point boiling point reactivity rate

and so forth.

So at the bottom we have a key with hysterics.

Where it indicates that a single hysteric indicates that that

particular element exists in a solid form.

If it's to hysterics it indicates that that particular element

exist in a liquid form.

And if we have three hysterics it indicates that that

particular element exists in the geisha state.

Now this is what our periodic table constitutes of.

And this is how it is arranged.

And you know that it didn't.

That's good metals and metals.

We have metal Lloyd.

Yeah and two.

Mhm. We have intelligence.

We have noble gases are actually at metals.

We have other color metals and so forth.

So that's how the entire table of element is arranged,

so that is how the period of table is arranged.

So we have reached the end of our lesson.

Thank you so much.

Bye.

Lesson outcome: Introduction to the elements of the periodic table

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