Periodicity

Question 1

Arrangement of elements

Answer 1

1. increasing atomic number
2. periods
3. groups

Question 2

Periodicity

Answer 2

1. repeating patterns
2. in physical or chemical properties
3. across different periods

Question 3

Atomic radius across a period

Answer 3

1. decreases
2. charge of nucleus increases
3. shielding stays the same
4. increased attraction to valence electron

Question 4

Atomic radius down a group

Answer 4

1. increases
2. increase shielding
3. increase nuclear charge

Question 5

Electrical conductivity from group 1-3

Answer 5

1. have increased number of electrons in outer shell
2. more are delocalised
3. more mobile charge carriers

Question 6

First ionisation energy

Answer 6

energy required to remove one electron from each atom in one mol of gaseous atoms to form 1 mol of gaseous 1+ ions

Question 7

1st IE down a group

Answer 7

1. decreases
2. increased shielding
3. increased atomic radius
4. increased nuclear charge is outweighed

Question 8

1st IE across a period

Answer 8

1. increases
2. atomic shielding decreases
3. increased nuclear charge
4. shielding remains the same
5. decreases g3 and g6

Question 9

1st IE group 3

Answer 9

1. s electrons provide additional shielding
2. valence electron more readily lost
3. IE decreases

Question 10

1st IE group 6

Answer 10

1. repulsion between 2 pair of p electrons
2. electron more readily lost
3. IE decreases

Question 11

Successive IE

Answer 11

1. increases
2. electrons removed from increasingly positive ion
3. big jumps in IE when electron is removed from shell closer to nucleus