The Periodic Table

Question 1

Define Ionisation Energy

Answer 1

Energy needed per mole to remove an electron from an atom in the gaseous phase

Question 2

What is the trend of Ionisation Energy

Answer 2

It increases across the period and decreases down the group

Question 3

What is Electron Affinity

Answer 3

The amount of energy released per mole when an atom or molecule gains an electron

Question 4

What group of elements have the highest electron affinity

Answer 4

Halogens

Question 5

What elements are most likely to form negative ions

Answer 5

Halogens

Question 6

What elements are most likely to form positive ions

Answer 6

Metals

Question 7

What is the trend of Electron Affinity

Answer 7

Increases across the period and decreases down the group

Question 8

Define electronegativity

Answer 8

The tendency of an atom to attract a pair of electrons to itself

Question 9

What is the trend of Electronegativity

Answer 9

Increases across the period and decreases down the group

Question 10

What is a cation

Answer 10

A positive ion

Question 11

What is an anion

Answer 11

A negative ion

Question 12

What is Atomic radius

Answer 12

Measure of the size of an atom

Question 13

What is Ionic radius

Answer 13

Measure of the size of an ion

Question 14

What is the trend of Atomic radii

Answer 14

Atoms decrease in size across the period and increase in size down the group