PATTERNS IN THE PERIODIC TABLE

Question 1

Describe the trend in melting and boiling points in the halogens

Answer 1

Increases down the group

Question 2

Give the state of Bromine at room temperature

Answer 2

Liquid

Question 3

Inert

Answer 3

Unreactive

Question 4

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

Answer 4

Metal chloride

Question 5

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

Answer 5

7 electrons in the outer shell

Question 6

In context of elements and the Periodic Table , define trend

Answer 6

A pattern in properties

Question 7

Explain why Bromine is less reactive than chlorine

Answer 7

Bromine has more shells / electrons
The outer shell is further from the nucleus
It has a weaker attraction from the nucleus to the outer shell
It’s harder to gain an outer shell electron

Question 8

Common name for group 0 elements

Answer 8

Noble gases

Question 9

Describe the trend in reactivity of the halogens

Answer 9

Decreases down the group

Question 10

Explain why the melting and boiling points of the halogens increase down the group

Answer 10

The molecules increase in size
The intermolecular forces become stronger
Which require more energy to overcome

Question 11

Describe the trend in reactivity of the alkali metals

Answer 11

Increases down the group

Question 12

Give the state of chlorine at room temperature

Answer 12

Gas

Question 13

Explain why the noble gases are inert

Answer 13

They have full outer shells , so they do not need to gain or lose electrons

Question 14

In terms of electrons, explain what alkali metals have in common

Answer 14

One electron in the outer shell It’s harder

Question 15

Give the state of iodine at room temperature

Answer 15

Solid

Question 16

Explain why Group 1 elements are called alkali metals

Answer 16

They are metals that react with water to from alkalis

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
Alkali metal decreases in size
If Potassium , a lilac flame is produced

Question 18

Give the common name for the group 7 elements

Answer 18

The halogens

Question 19

Explain why halogens are considered diatomic

Answer 19

They are made of 2 atoms bonded together in a small molecule

Question 20

Explain why Potassium is more reactive than lithium

Answer 20

Potassium has more shells/electrons
The outer shell is further from the nucleus
It has a weaker attraction from the nucleus to the outer shell
It’s easier to lose the outer shell electron