Ionic Compounds Exam

Section 1: The Periodic Table and Electrons. How many electrons are typically found in the outermost shell of Group 1 elements?

• 1

• 2

• 7

• 8

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Topic 1: The Octet Rule (Noble Gas Envy). Why are Noble Gases like Neon and Argon considered "chemically stable"?

• They have equal numbers of protons and neutrons.

• They have a full valence electron shell, usually containing 8 electrons.

• They are capable of forming both positive and negative ions.

• They have extremely high melting points compared to other elements.

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Topic 1: The Octet Rule (Noble Gas Envy). A magnesium atom has 2 valence electrons. What is its primary "goal" to achieve a stable octet?

• Gain 6 more electrons to fill its current shell.

• Share 2 electrons with another magnesium atom.

• Lose those 2 valence electrons to expose the full shell underneath.

• Keep its electrons but move them to a lower energy level.

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NGSS.HS-PS1-1

Topic 1: The Octet Rule (Noble Gas Envy). Which of the following elements would most likely want to gain exactly one electron to satisfy the octet rule?

• Sodium (Group 1)

• Calcium (Group 2)

• Chlorine (Group 17)

• Oxygen (Group 16)

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What is the correct formula for the compound, lithium oxide?

• LiO
• Li₂O
• LiO₂
• Li₂O₂

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An atom that has gained 2 electrons is classified as a:

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Which of the following lists contains ONLY cations?

• It is a metal from Group 3.

• It is a nonmetal that gained 3 electrons.

• It is a nonmetal that lost 3 protons.

• It is a noble gas.

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NGSS.HS-PS1-1

What is the fundamental force that holds an ionic bond together?

• Gravity

• Magnetic repulsion

• Electrostatic attraction between opposite charges

• Nuclear strong force

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• Sodium cannot bond with oxygen.

• The metal should be written second.

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