2.1.1/2 atomic structure

Question 1

Atomic number

Answer 1

Number of protons in nucleus

Question 2

Mass number

Answer 2

Total number of protons and neutrons in the atom

Question 3

Isotopes

Answer 3

Atoms of the same element with the same number of protons but different number of neutrons

Question 4

Relative isotopic mass

Answer 4

Mass of one isotope compared to 1/12th of the mass of an atom of carbon-12

Question 5

Relative atomic mass

Answer 5

Weighted mean mass of one atom compared to 1/12th of the mass of an atom of carbon-12

Question 6

Relative molecular mass

Answer 6

Average mass of a molecule compared to 1/12th of the mass of an atom of carbon-12

Question 7

Calculating relative atomic mass of an element

Answer 7

RAM = sum of (isotopic mass x relative abundance) / total relative abundance

Question 8

Spectator ions

Answer 8

Ions that are not changing state

Not changing oxidation number

Question 9

Writing ionic equation

Answer 9

Take full equation

Separate (aq) solutions into ions

Cancel out spectator ions leaving ionic equation