quiz 12

Question 1

Give the common name for the group 7 elements

Answer 1

The halogens

Question 2

Describe the trend in the melting and boiling points for the noble gases

Answer 2

increases down the group

Question 3

Give the common name for group 0 elements

Answer 3

The noble gases

Question 4

Explain why potassium is more reactive than lithium

Answer 4

it has more shells/electrons
it has a weaker attraction from the nuvleus to the outer shell
it is easier to lose the outer shell electron

Question 5

Name the product of a reaction between an alkali metal and chlorine

Answer 5

a metal chloride

Question 6

Describe the trend in the reactivity of the halogens

Answer 6

increases down the group

Question 7

Explain why sodium is less reactive than potassium

Answer 7

it has fewer shells/electrons
it has a stronger attraction from the nucleus to the outer shell
it is harder to lose outer electron

Question 8

Explain why bromine is less reactive than chlorine

Answer 8

it has more shells/electrons
it has a weaker attraction from the nucleus to the outer shell
it is harder to gain an outer shell electron

Question 9

In terms of electrons, describe what group 0 elements have in common

Answer 9

A full outer shell

Question 10

Give the state of fluorine at room temperature

Answer 10

Gas

Question 11

Explain why the following reaction does not proceed: KBr+ I2

Answer 11

iodine is less reactive than bromine so cant displace it from potassium bromide

Question 12

A sample of potassium is heated and burned in oxygen. Give 2 observations seen during the reaction

Answer 12

a lilac flame is produced
The potassium melts

Question 13

Explain why the group 1 elements are called alkali
metals

Answer 13

They are metals that react with water to form alkalis

Question 14

Define inert

Answer 14

unreactive

Question 15

In terms of electrons, describe what group 7 elements have in common

Answer 15

seven electrons in the outer shell

Question 16

Give the state of iodine at room temperature

Answer 16

solid

Question 17

State the typical observations when an alkali metal is added to water

Answer 17

fizzing
the alkali metal moves on the surface of the water
the alkali metal decreases in size
if potassium, a lilac flame is produced

Question 18

Give the state of chlorine at room tempreature?

Answer 18

gas

Question 19

Give the common name for the group 1 elements

Answer 19

alkali metals

Question 20

Explain why potassium bromide can react with chlorine

Answer 20

chlorine is more reactive than bromine, so can displace it from potassium bromide