Unit 1 Flashcards

(14 cards)

0
Q

Atom

A

Smallest unit of matter

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1
Q

Element

A

A pure substance made up of the same type of atom

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2
Q

Molecule

A

Two or more atoms bonded together (they may be the same or different)
Ex: H2

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3
Q

Compound

A

A substance containing two or more different elements in a fixed ratio

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4
Q

Valence electrons

A

Electrons in the outermost shell involved in bond formation

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5
Q

Polar bond

A

Results when two different non metals unequally share electrons between them

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6
Q

Hydrogen bond

A

When one water molecule bonds to another molecule (weak bond)

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7
Q

Solution

A

Liquid consisting of uniform mixture of two or more substances

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8
Q

Solvent

A

Liquid (dissolving agent)

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9
Q

Solute

A

Substances dissolved

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10
Q

Cohesion

A

Water molecules stick to each other due to hydrogen bonding

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11
Q

Adhesion

A

Water sticking to other substances

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12
Q

Specific heat

A

Amount of heat a substance needs for a given increase in temperature

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13
Q

Evaporative cooling

A

Some organisms pant/sweat to cool off when hot

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