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Honors Bio Ch. 2

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What is an atom?

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What is an element?

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What is a compound?

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Explanation

Their properties almost always change when formed

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Which of the following is located outside of the nucleus and is the smallest particle?

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What is an ion?

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What is formed by electrical forces through oppositely charged ions? (+|-)

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What forms when atoms share a pair of electrons?

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What is formed by 2+ atoms held together by covalent bonds?

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Match the definitions with the correct word.

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Adhesion
Cohesion

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The attraction among molecules of a substance
The attraction among molecules of different substances

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Which of the following statements is true?

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Why do non polar molecules rarely dissolve in water?

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Match each definition with the correct word

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Solvent
Solute
Solution

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Substance that dissolves in another substance
A mixture of substances that is the same throughout. (Homogeneous)
Substance that dissolves another substance

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What does pH measure? Pick the best answer.

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What is formed by an attraction between slightly positive hydrogen atom and a slightly negative atom?

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What is each subunit in a complete molecule?

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