2.1.1 Atomic structure and isotopes

Question 1

Define isotopes

Answer 1

Atoms of the same element with a different number of neutrons and different masses

Question 2

Proton relative charge and relative mass

Answer 2

relative charge: +1
relative mass: 1

Question 3

Neutron relative charge and relative mass

Answer 3

relative charge: 0
relative mass: 1

Question 4

Electron relative charge and relative mass

Answer 4

relative charge: -1
relative mass: 1/1835

Question 5

Atomic number

Answer 5

Number of protons in the nucleus of an atom

Question 6

Mass number

Answer 6

Total number of protons and neutrons

Question 7

Define relative isotopic mass

Answer 7

Mass of an isotope relative to 1/12th the mass of an atom of Carbon-12

Question 8

Define relative atomic mass

Answer 8

Weighted mean mass of an atom of an element relative to 1/12th the mass of an atom of Carbon-12