Module 3: Group 2

Question 1

What’s a base?

Answer 1

A substance which can accept H+ ions. Group 2 compound can neutralize acidic soils in agriculture and CaCO3 are used as antacids.

Question 2

What’s electron config?

Answer 2

The arrangement of electrons into orbitals and energy around nuclues of atoms.

Question 3

Whats first ionization energy?

Answer 3

The removal of one mole of electrons from one gaseous atom.

Factors are:
The strength of attraction between electron and nuclues
The nuclear charge
The atomic radius

Question 4

What’s the group 2 oxide?

Answer 4

A compound with the formula MO, M is a group 2 element. When group 2 oxide reacts with water, they form an alkaline solution, and the alkalinity increases the more you go down the group.

Question 5

Whats oxidation?

Answer 5

It’s the loss of electrons, increases the oxidation number

OILRIG

Question 6

Whats redox?

Answer 6

A reaction where one element is oxidized, and the other reduced. When its group 2, 2 electrons are lost they from 2+ ions. Group 2 has redox with water, oxygen and dilute acids.

Question 7

Whats reduction?

Answer 7

The gain of electrons, the decrease in oxidation number

OILRIG

Question 8

What’s the second ionization energy?

Answer 8

The removal of a mole of electrons from from a gaseous 1+ ions to form a mole of 2+ ions.