1st Half Term Flashcards

1
Q

A substance made up of one type of atom.

A

An element

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2
Q

Made up of more than one element chemically bonded/joined

A

A compound

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3
Q

More than one atom chemically joined together.

A

A molecule

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4
Q

An element

A

A substance made up of one type of atom

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5
Q

A compound

A

Made up of more than one element chemically joined/bonded

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6
Q

A molecule

A

More than one atom chemically joined together

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7
Q

What are the four main gases in the air?

A

Nitrogen
Oxygen
Carbon dioxide
Argon

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8
Q

What are the four main gases found in air (chemical formula)?

A

N2
O2
CO2
Ar

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9
Q

What is Nitrogen’s percentage in air?

A

78%

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10
Q

What is oxygen’s percentage in air?

A

21%

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11
Q

What is carbon dioxide’s percentage in air?

A

0.9%

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12
Q

What is argon’s percentage in air?

A

0.04%

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13
Q

Is nitrogen a molecule or an atom?

A

Molecule

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14
Q

Is oxygen an atom or molecule?

A

Molecule

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15
Q

Is carbon dioxide an atom or molecule?

A

Molecule

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16
Q

Is argon an atom or a molecule?

17
Q

Is O2 an element or compound?

18
Q

Is K an element or compound?

19
Q

Is CO2 an element or a compound?

20
Q

Is Cu an element or a compound?

21
Q

What is the name of NaO2?

A

Sodium oxide

22
Q

What is the name of CaCl2?

A

Calcium chloride

23
Q

What is the name of CuSO2?

A

Copper sulfate

24
Q

What is a chemical reaction in word equation form?

A

a+b(arrow)ab
E.g. copper+oxygen(arrow) copper oxide

25
Q

What is the difference between a compound and a mixture?

A

Compounds are substances which are only made from chemicals bonded elements whereas mixtures are substances formed from physically mixing two or more substances.

26
Q

How many oxygen atoms are there in CuO2?

27
Q

How many chlorine atoms are there in Cu(O2Cl3)3?