Atomic Structure and Isotopes

Question 1

Define the term ‘atomic (proton) number’

Answer 1

The number of protons in the nucleus of an atom

Question 2

Define the term ‘electron’

Answer 2

A fundamental particle found in the energy levels of an atom with a relative mass of 1/2000 and a relative charge of -1

Question 3

Define the term ‘isotope’

Answer 3

Atoms of an element with the same number of protons and electrons but a different number of neutrons

Question 4

Define the term ‘mass number’

Answer 4

The number of particles (protons and neutrons) in the nucleus

Question 5

Define the term ‘nucleus’

Answer 5

The central part of the atom in which the nucleons (neutrons and protons) are found

Question 6

Define the term ‘neutron’

Answer 6

A fundamental particle found in the nucleus of atoms with a relative mass of 1 and a relative charge of 0

Question 7

Define the term ‘proton’

Answer 7

A fundamental particle found in the nucleus of atoms with a relative mass of 1 and a relative charge of +1