Proton, Neutron, Electron

The diagram shows you a Helium symbol in periodic table. What is electron number of Helium?

• 6

• 4

• 2

Subatomic particles with positive charge is

• Proton

• Neutron

• Electron

Subatomic particle with negative charge is

• Proton

• Electron

• Neutron

Non-charged subatomic particle is

• Proton

• Electron

• Neutron

The fluorine atom has an atomic number (proton number) of

• 19

• 9

• 10

How many neutrons are there in one atom of magnesium?

• 12

• 6

• 24

What is the number of protons in an atom in this diagram?

• 10

• 7

• 3

• 4

The amount of which two particles are shown by the atomic number? Tick the correct answer(s).

• Nucleons

• Protons

• Electrons

• Neutrons

Neutrons + Protons = _________

• Atomic Number

• Atomic Mass

• Electrons

• Element

What is the atomic number of this atom?

• 1
• 3
• 4
• 7