Year 9 - Subatomic Particles

What is the atomic number equal to?

• The number of protons in the nucleus.

• The number of neutrons in the nucleus.

• The mass of an atom.

• The charge on an atom.

Tags

NGSS.MS-PS1-1

Which subatomic particles are found in the nucleus of an atom?

• Protons and Electrons.

• Protons and Neutrons.

• Neutrons and Electrons.

• Protons, Neutrons and Electrons.

Tags

NGSS.MS-PS1-1

What electrical charge does a proton have?

• +

• -

• 0

• 2+

Tags

NGSS.MS-PS2-3

Which two subatomic particles have the same mass?

• Protons and Electrons.

• Protons and Neutrons.

• Neutrons and Electrons.

• None of them are the same.

The total number of protons and neutrons in an atom is called the ____________

• Atomic number.

• Proton number.

• Mass number.

• Weight number.

Tags

NGSS.MS-PS1-1

How many protons does an aluminum atom have?

• 27

• 14

• 40

• 13

Tags

NGSS.MS-PS1-1

How many electrons does a sodium atom have?

• 23

• 11

• 12

• 34

Complete the missing label on the diagram.

• Neutron.

• Centre.

• Nucleus.

• Sub atomic particle.

Tags

NGSS.MS-PS1-1

Atoms of the same element must always have the same number of _________

• Electrons.

• Neutrons.

• Isotopes.

• Protons.

Tags

NGSS.MS-PS1-1

The _________ of an element equals the number of protons in an atom of that element.

• Mass number.

• Atomic weight.

• Atomic number.

• Isotopes.

Tags

NGSS.MS-PS1-1