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chemistry s2 > module 2 > Flashcards

module 2 Flashcards

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1
Q

how can chemical reactions be identified as?

A

energy changes

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2
Q

what are exothermic reactions?

A

EXOTHERMIC reactions release energy to the surroundings so the products have less chemical energy than the reactants.

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3
Q

what are endothermic reactions?

A

ENDOTHERMIC reactions take in energy from the surroundings so the products have more chemical energy than the reactants.

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4
Q

how do we use electrolysis?

A

Electrolysis can be used to break a compound into its elements

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5
Q

are chemical changes difficult or easy to reserve?

A

difficult

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6
Q

what is an atom?

A

the smallest particle of matter

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7
Q

how many elements are in the periodic table?

A

120

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8
Q

how many types of atom(s) do elements have?

A

1

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9
Q

are elements all natural?

A

elements are natural OR man made

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10
Q

what elements are liquid at room temperature?

A

bromine and hydrogen

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chemistry s2 (3 decks)

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