Science reviewer

What do you call a positively charged particle of an atom?

• Proton

• Neutron

• Electron

• Boron

Which subatomic particles is the lightest in terms of their masses?

• Neutron

• Boron

• Proton

• Electron

An atom has a central core composed of ____

• Electron and proton

• Proton and neutron

• Electron and neutron

• Electron proton and neutron

Who was the german scientist formulated the triad of element?

• Johann dobereiner

• John newland

• Dmitri mendeleev

• Lothar meyer

Oxygen has an atomic number of 8 and atomic weight of 16 calculate for the number of neutron?

• 7

• 8

• 9

• 10

Element name of N-14

• Nitrogen

• Neon

• Nickel

• Nibelium

Proton of fluorine

• 9

• 10

• 8

• 7

Electron of neon

• 10

• 9

• 8

• 7

Charge of magnesium

• +1

• -1

• +2

• -2

Which subatomic particles is the heaviest in terms of their masses?

• Electron

• Neutron

• Proton

• None of these