Matter And Atomic Structure

Front 1

element

Back 1

a substance that cannot be broken down into simpler substances by physical or chemical means

Front 2

atom

Back 2

the smallest particle of an element that that are made of

Front 3

nucleus

Back 3

of an atom that is made up of protons and neutrons

Front 4

proton

Back 4

a tiny particle that has mass and a postive elecrical charge

Front 5

neutron

Back 5

a particle with about the same mass as proton, but it has no electrical charge

Front 6

atomic number

Back 6

the number of protons in an atoms nucleus

Front 7

mass number

Back 7

the combined number of protons and neutrons

Front 8

electron

Back 8

smaller particles. has little mass and has a negative electrical charge

Front 9

energy level

Back 9

represents the ares in an atom where an electron is most likley to be found

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valence electrons

Back 10

outer most electrons

Front 11

isotopes

Back 11

when atoms of the same element have diffrent mass numbers

Front 12

atomic mass

Back 12

the average of the mass number of the isotopes of an element

Front 13

radioactivity

Back 13

the spontaneous process through which unstable nuclei emit radiation

Front 14

compound

Back 14

a substance that is composed of atoms of two or more different elements that are chemically combined

Front 15

chemical bonds

Back 15

the forces that hold the elements together in a compound

Front 16

covalent bond

Back 16

attraction of two atoms for a shared pair of electrons that holds the atoms together

Front 17

molecule

Back 17

composed of two or more atoms held together by covalent bonds

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ion

Back 18

an atom that gains or loses an electron is a charged particle

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ionic bond

Back 19

attractive force between two ions of oppostie charge

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chemical reactoin

Back 20

change of one or more substances into other substances

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solution

Back 21

homogenous mixture

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acid

Back 22

a solution containg a substance that produces hydrogen ions in water

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bases

Back 23

produce hydrocide ions in a solution

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plasma

Back 24

hot, highly ionized, electrically conducting gases

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liquid

Back 25

dosent have there own shape

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matter

Back 26

anything that has mass and volume

Front 27

energy

Back 27

capacity to move matter

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volume

Back 28

space that matter takes up

Front 29

size, shape,texture,odor, hardness, point that item freezing, melts or boils

Back 29

can change with or without changing chemical propperties

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most of an atom

Back 30

is empty space

Front 31

ci + h20
Na+h2o
NaCI + h20

Back 31

poisonous gas
explosion
salt water

Front 32

atoms combine in specific ratios to form molecules

Back 32

molecular formula

Front 33

uniform mixture

Back 33

particles of one substance that are evenly dispersed in another

Front 34

types of mixtures

Back 34

solution
suspension
colloids

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solvent

Back 35

dissolves the solute

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solute

Back 36

dissolved in solvent

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concentration gradiant

Back 37

amount of solute dissolved in a given amount of solvent

Front 38

suspension

Back 38

particles are temporarily mixed together usually cloudy

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colloids

Back 39

where the particles are so small they cannot be filtered out and will not fall out of the solution due to the molecular movement of the solvent