Subatomic Particles and Isotopes Quiz

Which subatomic particle has a positive charge?

• Electron

• Neutron

• Proton

• Atom

The atomic number of an atom is equal to the number of:

• Neutrons

• Protons

• Electrons only

• Neutrons + protons

The mass number of an atom is the sum of:

• Electrons and protons

• Neutrons and electrons

• Protons and neutrons

• Protons and atomic number

What is the symbol of the isotope with 9 protons and 10 neutrons?

• ¹⁹F

• ⁹F

• ¹⁰F

• ¹⁹₉F

How many neutrons are in the isotope Oxygen-18?

• 8

• 10

• 18

• 26

What is the charge of an electron?

• +1

• 0

• -1

• +2

What is the mass number of an atom with 17 protons and 18 neutrons?

• 17

• 35

• 18

• 34

1 amu is defined as:

• The mass of a proton

• The mass of 1 atom of oxygen

• 1/12 the mass of a carbon-12 atom

• 1 mole of atoms

Which particle determines the identity of an element?

• Neutron

• Proton

• Electron

• Mass number

What is the relative molecular mass of H₂O?

• 10

• 16

• 18

• 20