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Periodic Table Practice Tests

These Grade 10 Science practice tests develop understanding of periodic law, groups, periods, element families, metals, nonmetals, metalloids, valence electrons, atomic trends, ionization energy, electronegativity, and ion prediction.

Skills covered

  • Reading groups, periods, atomic number, metals, nonmetals, metalloids, and the staircase boundary
  • Recognizing alkali metals, alkaline earth metals, transition metals, halogens, noble gases, and chalcogens
  • Explaining trends in atomic radius, ionization energy, electronegativity, metallic character, shielding, and nuclear charge
  • Using valence electrons and simple electron arrangements to locate elements and predict reactivity
  • Predicting common ions, ionic formulas, element comparisons, and periodic-table limitations

How to use these practice tests

Locate the element first, then identify its group, period, family, and valence-electron pattern. Use the direction of a periodic trend to compare elements and justify predictions about ions or compounds.

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

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Grade 10 Periodic Table Practice Tests

Practice Grade 10 Science questions about periodic law, groups, periods, element families, metals, nonmetals, metalloids, valence electrons, periodic trends, and ion prediction.

Choose the best answer. Use the element position, family, valence electrons, and periodic trends to compare properties and predict likely ions or formulas.

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

How many valence electrons does neutral sodium usually have?

Please select an answer first.

Correct answer: A

The correct answer is 1.

  1. Locate the element or trend: Determine whether the question asks about a group, period, family, valence electrons, atomic size, ionization energy, electronegativity, or reactivity.
  2. Apply the periodic relationship: Sodium is in Group 1 and has one electron in its outermost occupied energy level.
  3. Check the prediction: The correct answer is 1.

Sodium is in Group 1 and has one electron in its outermost occupied energy level.

2. QuestionMultiple choice

How many valence electrons does neutral chlorine usually have?

Please select an answer first.

Correct answer: B

The correct answer is 7.

  1. Locate the element or trend: Determine whether the question asks about a group, period, family, valence electrons, atomic size, ionization energy, electronegativity, or reactivity.
  2. Apply the periodic relationship: Chlorine is in Group 17 and has seven valence electrons in the main-group pattern.
  3. Check the prediction: The correct answer is 7.

Chlorine is in Group 17 and has seven valence electrons in the main-group pattern.

3. QuestionMultiple choice

What ion is magnesium most likely to form?

Please select an answer first.

Correct answer: C

The correct answer is Mg²⁺.

  1. Locate the element or trend: Determine whether the question asks about a group, period, family, valence electrons, atomic size, ionization energy, electronegativity, or reactivity.
  2. Apply the periodic relationship: Magnesium is in Group 2 and commonly loses two electrons to form Mg²⁺.
  3. Check the prediction: The correct answer is Mg²⁺.

Magnesium is in Group 2 and commonly loses two electrons to form Mg²⁺.

4. QuestionMultiple choice

What ion is oxygen most likely to form?

Please select an answer first.

Correct answer: D

The correct answer is O²⁻.

  1. Locate the element or trend: Determine whether the question asks about a group, period, family, valence electrons, atomic size, ionization energy, electronegativity, or reactivity.
  2. Apply the periodic relationship: Oxygen commonly gains two electrons to complete its valence level, forming O²⁻.
  3. Check the prediction: The correct answer is O²⁻.

Oxygen commonly gains two electrons to complete its valence level, forming O²⁻.

5. QuestionMultiple choice

An element has one valence electron and is a main-group metal. Which family is most likely?

Please select an answer first.

Correct answer: A

The correct answer is Group 1 alkali metals.

  1. Locate the element or trend: Determine whether the question asks about a group, period, family, valence electrons, atomic size, ionization energy, electronegativity, or reactivity.
  2. Apply the periodic relationship: Main-group elements with one valence electron are typically Group 1 alkali metals.
  3. Check the prediction: The correct answer is Group 1 alkali metals.

Main-group elements with one valence electron are typically Group 1 alkali metals.

6. QuestionMultiple choice

Which simple electron arrangement is most likely for a Group 17 element in Period 3?

Please select an answer first.

Correct answer: B

The correct answer is [2, 8, 7].

  1. Locate the element or trend: Determine whether the question asks about a group, period, family, valence electrons, atomic size, ionization energy, electronegativity, or reactivity.
  2. Apply the periodic relationship: A Period 3 Group 17 element has three energy levels and seven outer electrons.
  3. Check the prediction: The correct answer is [2, 8, 7].

A Period 3 Group 17 element has three energy levels and seven outer electrons.

7. QuestionMultiple choice

An element has two valence electrons and three occupied energy levels. Where is it most likely located?

Please select an answer first.

Correct answer: C

The correct answer is Group 2, Period 3.

  1. Locate the element or trend: Determine whether the question asks about a group, period, family, valence electrons, atomic size, ionization energy, electronegativity, or reactivity.
  2. Apply the periodic relationship: Two valence electrons indicate Group 2, and three occupied levels indicate Period 3.
  3. Check the prediction: The correct answer is Group 2, Period 3.

Two valence electrons indicate Group 2, and three occupied levels indicate Period 3.

8. QuestionMultiple choice

What usually happens when a halogen forms an ion?

Please select an answer first.

Correct answer: D

The correct answer is It gains one electron and becomes a −1 anion..

  1. Locate the element or trend: Determine whether the question asks about a group, period, family, valence electrons, atomic size, ionization energy, electronegativity, or reactivity.
  2. Apply the periodic relationship: Halogens commonly gain one electron to complete the outer energy level.
  3. Check the prediction: The correct answer is It gains one electron and becomes a −1 anion..

Halogens commonly gain one electron to complete the outer energy level.

9. QuestionMultiple choice

What usually happens when an alkali metal forms an ion?

Please select an answer first.

Correct answer: A

The correct answer is It loses one valence electron and becomes a +1 cation..

  1. Locate the element or trend: Determine whether the question asks about a group, period, family, valence electrons, atomic size, ionization energy, electronegativity, or reactivity.
  2. Apply the periodic relationship: Group 1 metals commonly lose their single valence electron to form +1 ions.
  3. Check the prediction: The correct answer is It loses one valence electron and becomes a +1 cation..

Group 1 metals commonly lose their single valence electron to form +1 ions.

10. QuestionMultiple choice

Why do a Group 1 element and a Group 17 element often form an ionic compound?

Please select an answer first.

Correct answer: B

The correct answer is One tends to lose one electron while the other tends to gain one electron..

  1. Locate the element or trend: Determine whether the question asks about a group, period, family, valence electrons, atomic size, ionization energy, electronegativity, or reactivity.
  2. Apply the periodic relationship: Electron transfer creates oppositely charged ions that attract in an ionic compound.
  3. Check the prediction: The correct answer is One tends to lose one electron while the other tends to gain one electron..

Electron transfer creates oppositely charged ions that attract in an ionic compound.

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