C1

Question 1

Atom

Answer 1

Smallest particle of an element

Question 2

Atomic Number

Answer 2

The number of protons in the nucleus of an atom

Question 3

Chemical Change

Answer 3

A change that produces new substances and is irreversible

Question 4

Electron

Answer 4

A subatomic particle surrounding the nucleus of an atom. It is negatively charged and has a very small mass.

Question 5

Electron shell

Answer 5

The space in which electrons are held orbiting the nucleus

Question 6

Element

Answer 6

A substance consisting of atoms which have the same atomic number

Question 7

Isotope

Answer 7

Atoms with the same number of protons and electrons but different number of neutrons are isotopes of the same element

Question 8

Mass number

Answer 8

The number of protons and neutrons in the nucleus of an atom

Question 9

Neutron

Answer 9

A subatomic particle found in the nucleus of an atom. It has no charge and a relative mass of 1

Question 10

Physical change

Answer 10

A change such as a change in state that does not result in new substances being made. It is reversible

Question 11

Proton

Answer 11

A subatomic particle found in the nucleus of an atom. It has a positive charge.