Q: What is the rigid layer that is found outside the cell membrane and surrounds the cell? Choices: - cell barrier - cell shield - cell root - cell wall A:
cell wall
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Q: What form when a single atom gains or loses electrons? Choices: - fusional ions - vacuoles ions - carbon atoms - monatomic ions A:
monatomic ions
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Q: What is a substance that increases the hydrogen ion concentration of a solution? Choices: - carbon - sulfur - base - acid A:
acid
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Q: The group 18 gases that have 8 valence electrons are referred to as what type of gases? Choices: - novel - important - metal - noble A:
noble
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