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What are the three states of matter?

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23 Terms

1

What are the three states of matter?

solid

liquid

gas

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2

What is a solid?

the particles are arranged and close together

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3

What is a liquid?

the particles are randomly arranged and close together

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4

What is a gas?

the particles are randomly arranged and far apart

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5

What is a chemical change?

what is created is chemically different to what is reacted

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6

What is a physical change?

changing in state eg. melting

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7

What is a limitations?

the attraction and spaces between particles

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8

What did John Dalton do?

atoms make up all substances

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9

What did Tomson do?

the plum pudding model

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10

What did Rutherford do?

that atoms have a nucleus and the proton

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11

What did Bohr do?

electrons are in shells

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12

What is an atom?

negatively charged electrons surrounding a positive nucleus

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13

What is smaller molecules or atoms?

atoms as they make up molecules

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14

What is the relative charge and mass of a proton?

charge +1

mass 1

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15

What is the relative charge and mass of a neutron?

charge 0

mass 1

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16

What is the relative charge and mass of an electron?

charge -1

mass 1/1836

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17

What is an atomic number?

number of protons (electrons)

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18

What is an isotope?

an element with different neutrons but the same protons

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19

What is the mass number?

protons + neutrons

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20

What is an ion?

an atom with a charge

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21

How do you find the number of protons?

the same as the atomic number

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22

How do you find the number of neutrons?

mass number - atomic number

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23

How do you find the number of electrons?

number of protons

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