Key Words

Question 1

Relative isotopic mass

Answer 1

The mass of a Single isotope

Question 2

Relative atomic mass, Ar

Answer 2

The average mass of an atom of an element compared to 1/12th the mass of an atom of carbon-12

Question 3

A is the symbol for what

Answer 3

Mass number

Question 4

Z is the symbol for what

Answer 4

Atomic number

Question 5

Isotope

Answer 5

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

Question 6

Abundance

Answer 6

How common on isotope is

Question 7

Relative isotopic mass

Answer 7

The mass of a single isotope

Question 8

Relative molecular mass, Mr

Answer 8

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

Question 9

Ionisation

Answer 9

When an atom loses an electron to form a positive ion

Question 10

How to work out Ionisation energy

Answer 10

Energy of electron when removed - energy of electron in orbital

Question 11

Atomic orbital

Answer 11

A region around a nucleus that can hold up to 2 electrons with opposite spins

Question 12

Empirical formula

Answer 12

The simplest whole number ratio of each element in a compound

Question 13

Molecular formula

Answer 13

The actual number of atoms of an element in a compound

Question 14

Isoelectric

Answer 14

Same number of electrons or same electron configuration

Question 15

Line spectrum

Answer 15

A spectrum that shows only specific frequencies of light

Question 16

Molar volume of a gas

Answer 16

The volume occupied by one mole of gas at a specific temperature and pressure

Question 17

Electronegative

Answer 17

The power of an atom to attract the w electrons in a covalent bond

Question 18

Periodicity

Answer 18

Study of repeating patterns across a period