Proton, Electron, Neutron, Nucleon

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

• 6

• 4

• 2

Tags

NGSS.MS-PS1-1

Label R inside this periodic table.

• Alkali metals

• Alkaline earth metals

• Halogens

• Noble gas / inert gas

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

Tags

NGSS.MS-PS1-1

Please choose the correct answer of the Periodic Table Trends.

• atomic mass increase across the period.

• atomic mass decrease down the group

ALL atoms of the same element have:

• same number of proton

• same number of nucleon

• different number of neutron

• different number of electron

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

• 10

• 7

• 3

• 4