Which of the following has a full valence shell?

• Oxygen
• Neon
• Barium
• Carbon

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An ionic bond forms when atoms ___________ electrons.

• gain
• share
• increase
• transfer

Chemical bonds form when atoms

• combined nuclei
• give up neutrons
• gain protons
• share or transfer electrons

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If an atom loses two electrons what charge will it have?

• + 2
•  - 2
• +1
• -1

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How many valence electrons in this structure?

• 6
• 5
• 4
• 7

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13. What elements generally make a covalent bond?

• metal and nonmetal

• 2 or more nonmetals

• metal

• none of the above

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What is the electron configuration of sodium?

• 2.8
• 2.8.2
• 2.8.1
• 11

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What is the electron configuration of beryllium?

• 2.2
• 2.4
• 4
• 6

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NGSS.HS-PS1-2

 A lone pair is defined as

• A pair of bonding electrons
• One non-bonding electron
• A pair of non-bonding electrons
• A pair of electrons on the central atom

According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible?

• Pairs of valence electrons
• Inner shell electrons
• Mobile Electrons
• Electrons closest to the nucleus