Worksheet: The Structure of the Atom

In this worksheet, we will practice describing interactions between protons and neutrons in the atomic nucleus and electrons in the surrounding shells.

Q1:

Subatomic particles can have a charge.

What is the charge of a proton?

What is the charge of a neutron?

What is the charge of an electron?

Q2:

Which of the following has the smallest mass?

  • AA neutron
  • BAn electron
  • CA nucleus
  • DAn atom
  • EA proton

Q3:

Opposite charges attract each other via the electromagnetic force. Which of the following pairs of subatomic particles attract each other in this way?

  • AProtons and neutrons
  • BProtons and electrons
  • CElectrons and neutrons
  • DProtons and protons
  • EElectrons and electrons

Q4:

Like charges repel each other via the electromagnetic force. Which of the following pairs of subatomic particles repel each other in this way?

  • AProtons and electrons
  • BNeutrons and neutrons
  • CProtons and protons
  • DProtons and neutrons
  • ENeutrons and electrons

Q5:

What is the mass of an electron as a fraction of the mass of a proton or neutron?

  • A 1 1 9 5
  • B 1 1 8 4 0
  • C 1 9
  • D 1 7 2 9 0
  • E 1 4 0 8

Q6:

Where is most of the mass of an atom located?

  • AIn the nucleus
  • BIn the space between the nucleus and the electron shells
  • CIn the electron shells

Q7:

Where are the neutrons in an atom?

  • AThe nucleus
  • BThe nucleosome
  • CThe shells
  • DThe nuclide
  • EThe space around the nucleus

Q8:

Which particles can be found in the nucleus of an atom?

  • ANeutrons and electrons
  • BProtons and neutrons
  • CProtons and electrons
  • DPositrons and neutrons
  • EPositrons and electrons

Q9:

Fill in the blanks: An atom is a combination of a dense nucleus, containing and neutrons, and bound in the shells around the nucleus.

  • Anegatively charged, electrons, protons
  • Bpositively charged, protons, electrons
  • Cneutral, electrons, protons
  • Dnegatively charged, positrons, electrons
  • Eneutral, protons, electrons

Q10:

Where are the protons in an atom?

  • AThe shells
  • BThe space around the nucleus
  • CThe nucleus
  • DThe nuclide
  • EThe nucleosome

Q11:

Approximately how large is the radius of an atomic nucleus compared to the radius of the atom, 𝑅 ?

  • A 𝑅 1 0 0
  • B 𝑅 1 0 0 0 0 0
  • C 𝑅
  • D 𝑅 1 0 0 0
  • E 𝑅 1 0 0 0 0

Q12:

Where are the electrons in an atom?

  • AThe nuclide
  • BThe space around the nucleus
  • CThe nucleus
  • DThe space around the nucleosome
  • EThe nucleosome

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