6.2 Groups in the periodic table-group 7

Question 1

What is the colour and physical state of Chlorine?

Answer 1

It is a yellow-green gas

Question 2

What is the colour and physical state of Bromine?

Answer 2

It is a red-brown liquid

Question 3

What is the colour and physical state of Iodine?

Answer 3

It is a purple solid

Question 4

Why is there a trend in state as you go down the group?

Answer 4

.The melting and boiling points increase as you go down the group

Question 5

What can you predict from the melting and boiling points increasing as you go down the group?

Answer 5

.Any halogens above chlorine will be gases

.Any below iodine will be solid

Question 6

Describe the chemical test for Chloirne?

Answer 6

When damp litmus paper is put into a gas the litmus paper is bleached and turned white

Question 7

When reacting with metals what do Halogens from?

Answer 7

Ionic compounds

Question 8

What is the charge of a Halide ion?

Answer 8

-1

Question 9

What is the trend shown by the reaction as you move down group 7?

Answer 9

The reaction gets less vigorous

Question 10

What does a Halogen+Hydrogen form?

Answer 10

Hydrogen Halide

Question 11

True or False? Hydrogen Halides dissolve in water

Answer 11

True

Question 12

When dissolved in water what do Hydrogen Halides produce?

Answer 12

Acidic solutions

Question 13

Will the Hydrogen Halide fully or Partially dissociate in water?

Answer 13

It will fully dissociate

Question 14

When dissociated what will hydrogen halides form?

Answer 14

H+ and Halide- ions

Question 15

Where can a more reactive halogen displace a less reactive halogen?

Answer 15

In an aqueous solution of its salt

Question 16

What two halogens will chlorine displace?

Answer 16

Bromine and Iodine

Question 17

What will Bromine displace?

Answer 17

It will displace Iodine but not chlorine

Question 18

What will Iodine displace?

Answer 18

Neither Chlorine or Bromine

Question 19

Name three trends seen as you go down the group

Answer 19

.Outer shell becomes further from Nucleus
.Electron Shielding increases
.Attraction decreases between nucleus and outer electrons
.Electrons are gained less easily
.Halogens become less reactive

Question 20

What does OILRIG stand for?

Answer 20

Oxidation is loss of electrons Reduction is gain of electrons

Question 21

What does the more reactive Halogen which has displaced the less reactive one form?

Answer 21

A negative ion, therefore being reduced

Question 22

What will happen to the less reactive halogen that has been displaced?

Answer 22

It is oxidised as it gains electrons and goes from a negative ion to an atom of 0 charge

Question 23

What is the electron configuration of Fluorine?

Answer 23

2,7

Question 24

What is the electron configuration of Chlorine?

Answer 24

2,8,7

Question 25

What does an extra shell of electrons lead to?

Answer 25

Greater shielding and weaker attraction, reduced reactivity