Atomic Structure

Question 1

Mass number

Answer 1

The mass number is the total number of protons and neutrons in the nucleus of an atom

Question 2

Atomic number

Answer 2

The atomic number is the number of protons in the nucleus of an atom

Question 3

Ion

Answer 3

An ion is a charged particle formed when an atom loses or gains electrons

Question 4

Isotopes

Answer 4

Isotopes are atoms of an element with the same atomic number but a different mass number, indicating a different number of neutrons

Question 5

Relative atomic mass (definition)

Answer 5

The relative atomic mass (Ar) is the mass of an atom compared with that of a carbon-12 isotope which has a mass of exactly 12

Question 6

RAM(equation)

Answer 6

The sum of (mass of each isotope x %isotope)
——————————————————————-
The sum of % abundance for all isotopes

Question 7

Compound

Answer 7

Two or more elements chemically combined

Question 8

The size of an atoms radius

Answer 8

O.1nm

Question 9

The size of an atom’s nucleus compared to the atom

Answer 9

Less than 1/10000