Atomic Structure Quiz

What is the charge of a neutron?

• +2
• -1
• 0
• +1

1. Who proposed the planetary model of the atom?

• Niels Bohr
• Ernest Rutherford
• J.J. Thomson
• James Chadwick

3. Which of the following particles has the smallest mass?

• Electron
• Neutrino
• Proton
• Neutron

The atomic number of an element is determined by:

• The number of electrons in the atom.
• The total mass of the element.
• The number of neutrons in the nucleus.
• The number of protons in the nucleus.

Isotopes of an element have:

• The same number of neutrons but different numbers of protons.
• Different numbers of protons and neutrons.
• The same number of electrons but different numbers of protons.
• The same number of protons but different numbers of neutrons.

6. What is the maximum number of electrons that can be accommodated in the 2nd shell of an atom?

• 2

• 8

• 18

• 32

7. Who discovered the electron?

• Niels Bohr

• J.J. Thompson

• Ernest Rutherford

• James Chadwick

What is the mass number of an atom?

• Number of protons

• Sum of protons and neutrons

• Sum of electrons and protons

• Number of neutrons

Which subatomic particle is responsible for the chemical behavior of an atom?

• proton

• neutron

• electron

• nucleus

In Bohr’s model, electrons revolve around the nucleus in:

• Elliptical paths

• Straight lines

• Random trajectories

• Circular orbits with fixed energies