Periodic Table

Question 1

Nucleon Mass

Answer 1

total number of protons and neutrons in the nucleus of an atom [mass number]

Question 2

Why do atoms react

Answer 2

Atoms want to have full outer shells (full set of valency electrons), this is why they react

Question 3

Isotopes

Answer 3

Atoms of the same element which have the same protons number, but a different nucleon number. They have the same chemical properties due to the same number of outermost shell electrons.

Question 4

What are the types of isotopes?

Answer 4

Non-radioactive isotopes and radioactive isotopes3 (unstable atoms that break down and produce radiation)

Question 5

3 Properties of Metals

Answer 5

Good conductors of heat & electricity, High m.p. and b.p., High density, Forms basic oxides, Forms cations in reactions, Malleable and ductile

Question 6

3 properties of non-metals

Answer 6

Poor conductors of heat & electricity (except graphite), Low density, Forms acidic oxides, Forms anions in reactions, Not malleable or ductile

Question 7

Ionic Bonding definition

Answer 7

The electrostatic force of attraction between a lattice of alternating positive and negative ions

Question 8

Property of Ionic Bonding

Answer 8

Form giant lattice, High m.p. and b.p., Don’t conduct electricity when solid, Conduct electricity when molten/aqueous,

Question 9

Covalent Bonding

Answer 9

When atoms share electrons to obtain a full outer shell electron configuration; only between non-metals.

Question 10

Metallic bonding

Answer 10

An electrostatic force of attraction between a lattice of positive metal ions and a sea of mobile electrons