3. The Periodic Table

Question 1

Who was the Russian Chemist who designed the periodic table?

Answer 1

Dimitri MENDELEEV

Question 2

Things to know about Group 0

Answer 2

The elements in Group 0 are known as known as NOBLE GASES.

This means they have a full outer shell of electrons.

Due to this, they are un reactive non-metals.

Question 3

Things to know about Group 1

Answer 3

These are known as ALKALI METALS.

They have one electron in there outer shell
Low melting and boiling points.

Question 4

Alkali Metals

Answer 4

When Alkali Metals react with water a metal hydroxide is formed and a hydrogen gas is given off.

Group 1 Metals have a low density.

Question 5

Things to know about Group 7

Answer 5

These are non Metals and known as HALOGENS.

They have 7 electrons in their outermost shell.

Reactivity decreases down the group because the outer shell gets further away from the nucleus.