Atoms elements and compounds

Question 1

Atoms

Answer 1

All substances are made up of tiny particles called atoms.
Some substances contain only one type of atom. These are called elements

Question 2

Elements

Answer 2

Elements cannot be broken down into simpler substances.
Every element has its own chemical symbol, which appears in the periodic table of the elements.

Question 3

Subatomic particles

Answer 3

The three subatomic particles that make up an atom are the proton, neutron and electron.

Question 4

Proton

Answer 4

Protons are positive and found in the nucleus

Question 5

Neutron

Answer 5

Neutrons are neutral and found in the nucleus

Question 6

Electron

Answer 6

Electrons are negative and are found orbiting the nucleus

Question 7

Atomic number

Answer 7

The atomic number of an element is the number of protons in an atom of that element(smaller)

Question 8

Mass number

Answer 8

The mass number of an element is the total number of protons plus neutrons in an atom of that element

Question 9

Metals

Answer 9

Metals are materials that are usually hard, dense, shiny and have high melting points. They are good conductors of heat and electricity.

Metals can be hammered into shape (malleable) and can be stretched into wire (ductile).