1(c) Atomic Structure

Question 1

1.14

know what is meant by the terms atom

Answer 1

The smallest particle of matter

Question 2

know what is meant by the terms molecule

Answer 2

Substance madea from two or more atoms joined together by chemical bonds

Question 3

1.15

know the structure of an atom in terms of the positions, relative masses and relative
charges of sub-atomic particles

Answer 3

Protons
Relative mass: 1
Relative charge: +1
Neutrons
Relative mass: 1
Relative charge: 0
Electrons
Relative mass: 1/1836
Relative charge: -1

Question 4

1.16

know what is meant by the term atomic number

Answer 4

number of protons

Question 5

1.16

know what is meant by the term mass number

Answer 5

number of protons and neutrons

Question 6

1.16

know what is meant by the term isotopes

Answer 6

an atom of an element with the same number of protons but a different number of neutrons

Question 7

1.16

know what is meant by the term relative
atomic mass (Ar)

Answer 7

The relative atomic mass of an element is the weighted average mass of the isotopes of the element compared to the mass of a carbon-12 atom.

Question 8

1.17

Be able to calculate the relative atomic mass of an element (Ar) from isotopic
abundances