Group 7 - The Halogens

Question 1

What are the formulas of the halogens at room temperature?

Answer 1

X2

Eg. Cl2 …

Question 2

What is fluorine’s state at room temperature?

Answer 2

Pale yellow gas

Question 3

What is Chlorine’s state at room temperature?

Answer 3

Green gas

Question 4

What is Bromine’s state at room temperature?

Answer 4

Red/Brown Liquid

Question 5

What is Iodine’s state at room temperature?

Answer 5

Grey Solid

Question 6

What is the trend in boiling points down group 7?

Answer 6

Increase as increase in Van der Waals strength

Question 7

what happens to the electronegativity down group7?

Answer 7

it decreases
Larger atoms attract less than smaller ones as outer electrons further from nucleus and more shielding as more inner electrons.

Question 8

How many electrons do Halogens lose or gain when they react?

Answer 8

Gain 1 Electron

become 1-

Means that they are Oxidising Agents but they themselves have been reduced.

Question 9

What happens to the reactivity as you go down group 7?

Answer 9

It decreases
as the atoms get larger
they become less oxidising

Question 10

what are group 7 elements also known as?

Answer 10

Halogens