Worksheet: The Structure of Atoms

In this worksheet, we will practice describing the structure of the atom and what atoms are composed of and relate their size to everyday objects.

Q1:

Subatomic particles can have a charge.

What is the charge of a proton?

  • A1
  • B1+
  • C2+
  • D0
  • E2

What is the charge of a neutron?

What is the charge of an electron?

  • A1+
  • B0
  • C2
  • D1
  • E2+

Q2:

Which of the following has the smallest mass?

  • AAn electron
  • BA proton
  • CA nucleus
  • DA neutron
  • EAn atom

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 protons
  • CElectrons and neutrons
  • DElectrons and electrons
  • EProtons 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?

  • ANeutrons and electrons
  • BProtons and protons
  • CProtons and neutrons
  • DProtons and electrons
  • ENeutrons and neutrons

Q5:

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

  • A19
  • B1195
  • C17,290
  • D1408
  • E11,840

Q6:

Where is most of the mass of an atom located?

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

Q7:

Where are the neutrons in an atom?

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

Q8:

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

  • ANeutrons and electrons
  • BPositrons and electrons
  • CProtons and neutrons
  • DPositrons and neutrons
  • EProtons 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.

  • Aneutral, protons, electrons
  • Bnegatively charged, electrons, protons
  • Cnegatively charged, positrons, electrons
  • Dpositively charged, protons, electrons
  • Eneutral, electrons, protons

Q10:

Where are the protons in an atom?

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

Q11:

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

  • A𝑅
  • B𝑅100
  • C𝑅100,000
  • D𝑅1,000
  • E𝑅10,000

Q12:

Where are the electrons in an atom?

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

Q13:

Why do atoms not have an overall charge?

  • AThe number of electrons equals the number of protons.
  • BThe number of electrons plus protons equals the number of neutrons.
  • CThe number of electrons equals the number of neutrons.
  • DThe number of neutrons equals the number of protons.
  • EThe number of electrons and neutrons equals the number of protons.

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