Halogens

The Halogens

 

The halogens is the seventh group in the periodic table and it consisted of 5 non-metallic elements. The meaning of the term “halogen” means “salt-former” and compounds containing halogens are called “salts”. All halogens have 7 electrons in their outer shells, thats why the are all placed in the 7th group..

The halogens can exist , at room temperature, in all three states of matter:

 

• Solid- Iodine, Astatine

• Liquid- Bromine

• Gas- Fluorine, Chlorine

this table shows the boiling and melting points for the halogens elements

Atomic radius:

Moving from the top to the bottom of the column in group 3 will increase the number of shells because every row has a level and as you move from a level to another level the shells and electrons increase.

Location on the periodic table:

This group is located as the second group in the periodic table because every time in the outer shell you are left with 2 electrons.

Uses on earth

Fluorine is one of the most used elements starting from world war 2 when the production of the atom bomb and other nuclear energy started fluorine was an important part of making these bombs.