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Biology 101 > Chapter 2 > Flashcards

Chapter 2 Flashcards

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1
Q

Matter

A

Has mass and occupies space/Composed of atoms

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2
Q

Atomic # equals…

A

Number of protons

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3
Q

Mass

A

Amount of substance

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4
Q

Cation

A

More protons than electrons

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5
Q

Anion

A

Less protons than electrons

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6
Q

Isotopes

A

Elements that have the same number of protons but different numbers of neutrons.

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7
Q

Oxidation

A

Loss of an electron

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8
Q

Reduction

A

Gain of an electron

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9
Q

Octet Rule

A

Atoms with full outer energy levels (ex. noble gases)

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10
Q

4 elements that make up the human body

A

Carbon, Hydrogen, Oxygen, Nitrogen

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11
Q

Ionic Bonds

A

The attraction of oppositely charged ions (Electron transfer-atom that loses electrons is positive while atom that gains is negative)

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12
Q

Covalent Bonds

A

Atoms share 2 or more valence electrons

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13
Q

Non Polar Covalent Bonds

A

equal sharing of electrons

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14
Q

Polar Covalent Bonds

A

unequal sharing of electrons

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15
Q

Reactants

A

OG molecules

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16
Q

Products

A

Molecules resulting from reaction

17
Q

Chemical reactions can be influenced by (3)

A

Temp
catalysts
the concentration of reactants and products

18
Q

Cohesion (latin for stick)

A

being mutually attracted to one another: Water is attracted to water

19
Q

Adhesion

A

Firm attachment: Water is attached to other stuff

20
Q

Solid water is less dense than..

A

liquid water

21
Q

Acid

A

Any substance in water that dissociates in water: Increases H+ and lowers pH!!

22
Q

Base

A

Substance combines with H+, dissolves in water: lowers H+

23
Q

pH scale

A

0-6 is acidic and 7-14 is basic

24
Q

Buffers

A

Substance that resists change in pH

Biology 101 (4 decks)

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