biochemistry

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matter

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24 Terms

1

matter

all living things are made of

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2

atoms

matter is made up of very small molecules called:

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3

-protons -neutrons electrons

name the 3 subatomic particles

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4

nucleus

center of an atom

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5

protons + neutrons 0

which particles are in the nucleus

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6

electron cloud

where do we find electrons

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7

elements

substances made up of atoms that have the same number of protons called

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8

6 protons

element of carbon have how many protons

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9

isotope

atoms of an element have a different number of neutrons

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10

8 neutrons

carbon 14 has 6 protons and _________

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11

mass number

protons +neutrons

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12

electrons

number of protons = number of _______ in a neutral atom

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13

25 elements

essential to living organisms

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14

carbon hydrogen oxygen nitrogen

4 essential elements

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15

96%

4 main element make up what percent of the human body

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16

chemically bonding

atoms of two diff kinds form by

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17

2

how many electrons does the first ring hold

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18

8

how many electrons does the outermost hold

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19

ionic bonds

one atom gives up one or more electrons to another atom

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20

covalent bond

share electrons

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21

molecule

group of atoms held by covalent bonds

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22

polar

electrons are not shared equally

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23

yes

is water polar

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24

positively charged hydrogen atoms and negatively charger oxygen atoms

weak hydrogen bonds form between

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