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Science year 8 > matter > Flashcards

matter Flashcards

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1
Q

Alkali metals

A

The elements in the left column of the periodic table. They are very reactive.

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2
Q

Atom

A

The smallest part of an element that can exist

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3
Q

Carbonate

A

A compound that includes carbon and oxygen atoms.

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4
Q

Chemical formulae

A

A formula that shows the elements present in a compound and their relevant proportions.

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5
Q

Chemical properties

A

Features of the way a substance reacts with other substances.

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6
Q

Chemical symbol

A

A one or two letter code for an element. This always starts with a capital letter

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7
Q

Compound

A

Pure substances made of more than one type of atom joined together.

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8
Q

Elements

A

Pure substance containing only one atom type

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9
Q

Group

A

A column of the periodic table. They have similar properties.

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10
Q

Group 0

A

The far right column on the periodic table containing not very reactive gases. Also called the Noble gases

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11
Q

Group 1

A

Left column of the periodic table. Very reactive metals. Also called the alkali metals.

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12
Q

Group 7

A

Very reactive non- metals. Also called the halogens.

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13
Q

Halogen

A

The name for the very reactive non metals in group 7 that can carry out displacement reactions.

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14
Q

Hydroxide

A

A compound containing hydrogen and oxygen.

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15
Q

Molecule

A

More than one atom joined together.

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16
Q

Natural polymer

A

Lots of repetitive chemical units joined together. These occur naturally in nature like DNA and starch.

17
Q

Nitrate (chemistry)

A

A compound containing nitrogen, hydrogen and oxygen.

18
Q

Noble gases

A

Group 0 elements. Not very reactive gases.

19
Q

Period

A

Rows in the periodic table. There are trends in the periodic table as you go along periods.

20
Q

Periodic table

A

A table of known elements grouped due to their properties.

21
Q

Physical properties

A

Properties which can be observed without any change to the substance itself. For example, boiling point doesn’t actually change the substance, just it’s state.

22
Q

Polymer

A

A molecule made of lots of smaller molecules joined together in repetitive units.

23
Q

Sulfate

A

A molecule containing sulfur and oxygen.

24
Q

synthetic polymer

A

A polymer made in a lab/ factory. Plastics are synthetic polymers

25
Q

Trend

A

A pattern in properties, such an increase or decrease.

26
Q

Unreactive

A

A substance does not easily undergo chemical reactions with other elements.

Science year 8 (6 decks)

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