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25 Terms

1
What are the properties of a metal?

Conducts heat, conducts electricity, ductile, malleable, shiny, tend to be solid at room temperature (except mercury)

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2
What are the properties of a non-metal?

Brittle, does not conduct heat or electricity, dull, can be solid, liquid, or gas

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3
What is the definition of malleable?

Can be hammered into a shape

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4
What is the definition of ductile?

Can be stretched into a wire

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5
What is the definition of an element?

A substance made of only one type of atom

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6
What is the definition of an atom?

The smallest part of an element that can exist

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7
What is the definition of compound?

A substance made up of two or more elements chemically joined together

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8
What are the 5 key observations of a chemical change?

Fizzing/bubbling, odour, colour change, heat change, precipitate formed

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9
What is a physical change? Give examples.

A reversible change; e.g. a change in state: evaporation or melting

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10
What is a reactant?

A starting substance in a chemical reaction (left-hand side of the arrow)

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11
What is a product?

A substance that is made in a chemical reaction (right-hand side of the arrow)

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12
Does a compound have the same properties as the elements it is made from?

No, the properties of a compound and its elements are different

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13
What does NaCl mean?

This is a compound containing sodium and chlorine. There is one atom of each element

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14

What does C6H12O6 mean?

This compound contains 6 atoms of carbon, 12 atoms of hydrogen, and 6 atoms of oxygen

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15
What is the definition of a chemical reaction?

A change in which atoms are rearranged to create new substances (new products)

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16
Which symbol do you find in a word equation in between the reactants and the products?

An arrow (→). Never an equals sign! E.g. reactants → products

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17
What is the definition of the word atom?

The smallest part of an element that can exist

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18
What is the definition of the word proton?

A positively charged subatomic particle

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19
What is the definition of the word neutron?

A neutral charged subatomic particle

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20
What is the definition of the word electron?

A negatively charged subatomic particle

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21
What is the definition of nucleus in chemistry?

The centre of the atom where protons and neutrons are found

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22
What is a trend?

Specific patterns that can be identified in data and graphs

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23
What is the mass and charge of a proton?

Mass of 1 and charge of +1

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24
What is the mass and charge of a neutron?

Mass of 1 and charge of 0

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25
What is the mass and charge of an electron?

Mass of 1/2000 and charge of -1

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