ENIOLA’S AUGUST CHEMISTRY ASSESSMENT

The relative charge of a proton is:

• –1

• 0

• +1

• +2

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

• Protons and neutrons

• Neutrons and electrons

• Protons and electrons

• Only protons

The atomic number of sodium is 11. This means sodium has:

• 11 neutrons

• 11 protons

• 11 electrons in its outer shell

• 22 protons

Isotopes of the same element have:

• The same number of protons but different number of neutrons

• The same number of neutrons but different number of protons

• Different numbers of protons and electrons

• Different atomic numbers

An atom of magnesium has 12 protons, 12 neutrons and 12 electrons. Its mass number is:

• 12

• 24

• 36

• 144

Which element is in Group 1 of the periodic table?

• Calcium

• Potassium

• Magnesium

• Aluminum

Elements in the same group of the periodic table have:

• The same number of protons

• The same number of neutrons

• The same number of electrons in the outer shell

• The same mass number

Which noble gas has 2 electrons in its outer shell?

• Neon

• Helium

• Argon

• Krypton

The relative mass of an electron is approximately:

• 1

• 0

• 1/2000

• 2000

Which particle has no charge?

• Proton

• Neutron

• Electron

• Positron