4.2 group 7 elements

Question 1

what are the trends in properties in group 7 elements

Answer 1

Diatomic
get darker down the group
MP/BP increases down the group

Question 2

what do you call group 7 elements

Answer 2

Halogens

Question 3

what are halogens

Answer 3

covalently bonded, simple molecular bonds

Question 4

What happens with the reaction of metals

Answer 4

The outer shell electrons from the metal are transferred to the halogen

Question 5

what anagram helps us understand reduction and gain with halogens and metals

Answer 5

OIL RIG
Oxidised= loose electrons
Reduction = gain electrons

Question 6

what happens as you go down the periodic table with halogens

Answer 6

Halogens get less reactive down the group

Question 7

how do halogens react

Answer 7

by gaining electrons

Question 8

What are facts about halogens (group 7 elements)

Answer 8

7 outer shell electrons
very reactive
react by gaining an electron to form ions or sharing an electron in a covalent bond

boiling points increase down the group as molecules are heavier + intermolecular forces are stronger and they require more energy to overcome

as elements they are Diatomic

Question 9

why do the halogens get less reactive as you down the periodic table

Answer 9

Atoms have more electrons shells

the extra electron is further from the nucleus

So its attraction to the nucleus is weaker

Question 10

what is the test for chlorine

Answer 10

Damp blue litmus paper
turns white if present