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Atomic Structure Practice Tests

These Grade 10 Science practice tests develop understanding of atomic models, protons, neutrons, electrons, atomic number, mass number, isotopes, ions, electron arrangements, energy levels, and atomic spectra.

Skills covered

  • Identifying the nucleus, protons, neutrons, electrons, atomic number, mass number, and neutral atoms
  • Calculating protons, neutrons, electrons, isotope mass numbers, and ion charges
  • Using valence electrons, energy levels, orbitals, Bohr models, electron clouds, and simple electron arrangements
  • Explaining ground states, excited states, photons, emission spectra, wavelength, frequency, and flame tests
  • Comparing Dalton, Thomson, Rutherford, Bohr, and modern quantum models of the atom

How to use these practice tests

Start with the atomic number and charge. Count protons, neutrons, and electrons carefully, then connect electron arrangement to energy, bonding, periodic position, and chemical behavior.

For more Grade 10 Science practice, return to the Grade 10 Science category.

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5 Tests
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1. Test

Grade 10 Atomic Structure Practice Tests

Practice Grade 10 Science questions about atomic models, protons, neutrons, electrons, atomic number, isotopes, ions, electron arrangements, energy levels, and spectra.

Choose the best answer. Use atomic number, mass number, charge, electron arrangements, energy levels, and atomic models to evaluate each question.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What is the nucleus of an atom?

Please select an answer first.

Correct answer: A

The correct answer is The dense central region containing protons and neutrons.

  1. Identify the atomic quantity: Determine whether the question asks about the nucleus, subatomic particles, atomic number, mass number, charge, electrons, or energy levels.
  2. Use the atomic model: The nucleus contains nearly all atomic mass because it contains protons and neutrons.
  3. Check the calculation or relationship: The correct answer is The dense central region containing protons and neutrons.

The nucleus contains nearly all atomic mass because it contains protons and neutrons.

2. QuestionMultiple choice

Which particle determines the identity of an element?

Please select an answer first.

Correct answer: B

The correct answer is The proton.

  1. Identify the atomic quantity: Determine whether the question asks about the nucleus, subatomic particles, atomic number, mass number, charge, electrons, or energy levels.
  2. Use the atomic model: All atoms of one element have the same number of protons, which is the atomic number.
  3. Check the calculation or relationship: The correct answer is The proton.

All atoms of one element have the same number of protons, which is the atomic number.

3. QuestionMultiple choice

Which particle can vary in number while the atom remains the same element?

Please select an answer first.

Correct answer: C

The correct answer is The neutron.

  1. Identify the atomic quantity: Determine whether the question asks about the nucleus, subatomic particles, atomic number, mass number, charge, electrons, or energy levels.
  2. Use the atomic model: Changing the neutron number creates an isotope without changing the element identity.
  3. Check the calculation or relationship: The correct answer is The neutron.

Changing the neutron number creates an isotope without changing the element identity.

4. QuestionMultiple choice

Which statement describes an electron?

Please select an answer first.

Correct answer: D

The correct answer is It has a negative charge and occupies a region around the nucleus..

  1. Identify the atomic quantity: Determine whether the question asks about the nucleus, subatomic particles, atomic number, mass number, charge, electrons, or energy levels.
  2. Use the atomic model: Electrons are negatively charged and are found in the electron cloud around the nucleus.
  3. Check the calculation or relationship: The correct answer is It has a negative charge and occupies a region around the nucleus..

Electrons are negatively charged and are found in the electron cloud around the nucleus.

5. QuestionMultiple choice

What is the atomic number of an atom with 8 protons?

Please select an answer first.

Correct answer: A

The correct answer is 8.

  1. Identify the atomic quantity: Determine whether the question asks about the nucleus, subatomic particles, atomic number, mass number, charge, electrons, or energy levels.
  2. Use the atomic model: The atomic number equals the number of protons, so this atom has atomic number 8.
  3. Check the calculation or relationship: The correct answer is 8.

The atomic number equals the number of protons, so this atom has atomic number 8.

6. QuestionMultiple choice

What is the mass number of an atom with 11 protons and 12 neutrons?

Please select an answer first.

Correct answer: B

The correct answer is 23.

  1. Identify the atomic quantity: Determine whether the question asks about the nucleus, subatomic particles, atomic number, mass number, charge, electrons, or energy levels.
  2. Use the atomic model: Mass number is the sum of protons and neutrons: 11 + 12 = 23.
  3. Check the calculation or relationship: The correct answer is 23.

Mass number is the sum of protons and neutrons: 11 + 12 = 23.

7. QuestionMultiple choice

What makes carbon-12 and carbon-14 isotopes of the same element?

Please select an answer first.

Correct answer: C

The correct answer is They have the same number of protons but different numbers of neutrons..

  1. Identify the atomic quantity: Determine whether the question asks about the nucleus, subatomic particles, atomic number, mass number, charge, electrons, or energy levels.
  2. Use the atomic model: Both are carbon because each has 6 protons, but carbon-14 has more neutrons than carbon-12.
  3. Check the calculation or relationship: The correct answer is They have the same number of protons but different numbers of neutrons..

Both are carbon because each has 6 protons, but carbon-14 has more neutrons than carbon-12.

8. QuestionMultiple choice

When is an atom electrically neutral?

Please select an answer first.

Correct answer: D

The correct answer is When it has equal numbers of protons and electrons.

  1. Identify the atomic quantity: Determine whether the question asks about the nucleus, subatomic particles, atomic number, mass number, charge, electrons, or energy levels.
  2. Use the atomic model: Equal positive and negative charges cancel, producing a net charge of zero.
  3. Check the calculation or relationship: The correct answer is When it has equal numbers of protons and electrons.

Equal positive and negative charges cancel, producing a net charge of zero.

9. QuestionMultiple choice

What is an ion?

Please select an answer first.

Correct answer: A

The correct answer is A particle with a net electric charge caused by gaining or losing electrons.

  1. Identify the atomic quantity: Determine whether the question asks about the nucleus, subatomic particles, atomic number, mass number, charge, electrons, or energy levels.
  2. Use the atomic model: Electron gain or loss changes the balance of positive and negative charge.
  3. Check the calculation or relationship: The correct answer is A particle with a net electric charge caused by gaining or losing electrons.

Electron gain or loss changes the balance of positive and negative charge.

10. QuestionMultiple choice

What is a cation?

Please select an answer first.

Correct answer: B

The correct answer is A positively charged ion formed when electrons are lost.

  1. Identify the atomic quantity: Determine whether the question asks about the nucleus, subatomic particles, atomic number, mass number, charge, electrons, or energy levels.
  2. Use the atomic model: Losing negative electrons leaves the ion with a net positive charge.
  3. Check the calculation or relationship: The correct answer is A positively charged ion formed when electrons are lost.

Losing negative electrons leaves the ion with a net positive charge.

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