Topic 1 - Atomic Structure and the Periodic Table

Question 1

Atomic number

Answer 1

Number of protons in the nucleus of an atom

Question 2

Mass number

Answer 2

Sum of protons and neutrons in the nucleus of an atom

Question 3

Isotope

Answer 3

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

Question 4

Relative atomic mass (RAM)

Answer 4

Average mass of an atom of an element relative to 1/12th of the mass of a carbon-12 atom

Question 5

Relative isotopic mass (RIM)

Answer 5

Average mass of an atom of an isotope relative to 1/12th of the mass of a carbon-12 atom

Question 6

Relative molecular mass

Answer 6

Average mass of a molecule relative to 1/12th of a carbon-12 atom

Question 7

First ionisation energy

Answer 7

Amount of energy required to remove the outermost electron each from one mole of gaseous atoms

Question 8

Second ionisation energy

Answer 8

Amount of energy required to remove the second outermost electron from one mole of gaseous 1+ ions

Question 9

Orbital

Answer 9

A region in an atom that can hold two electrons with opposite spin