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Chemistry > Compounds > Flashcards

Compounds Flashcards

Numbers in chemical formulas are meant to be subscript

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1
Q

What is a compound?

A

A substance with 2 or more elements whose atoms are chemically combined in a fixed proportion

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2
Q

If there is a metal present in the compound where does it go?

A

At the beginning

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3
Q

If there are only 2 elements present in a compound what happens to the 2nd element?

A

The ending changes to ide

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4
Q

What happens if there is a metal, hydrogen and oxygen (ONLY) in a compound?

A

We call it a metal hydroxide

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5
Q

What happens if there is a metal any other element (Not hydrogen) and oxygen in a compound?

A

the ending changes to ate

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6
Q

What is the compound name for iodine and sodium?

A

sodium iodide

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7
Q

What is the compound name for oxygen, potassium and bromine

A

Potassium Bromate

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8
Q

What is the compound name for hydrogen, calcium and oxygen

A

calcium hydroxide

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9
Q

What elements are in calcium carbide?

A

Calcium and carbon

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10
Q

What elements are in potassium nitrate

A

Potassium, nitrogen and oxygen

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11
Q

What elements are in sodium hydroxide?

A

Sodium, hydrogen and oxygen

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12
Q

What does copper look like?

A

shiny red-brown solids

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13
Q

What does oxygen look like?

A

Colourless gas

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14
Q

What does silicon look like?

A

Shiny black solid

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15
Q

What does sulphur look like?

A

Yellow powder

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16
Q

What does iron look like?

A

Shiny grey solids

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17
Q

What does carbon look like?

A

Black powder

18
Q

What does copper oxide look like?

A

Black/red powder

19
Q

What does silicon dioxide look like?

A

White powder

20
Q

What does copper sulphate look like?

A

Blue powder

21
Q

What does iron sulphide look like?

A

Dull grey solid

22
Q

What does copper carbonate look like?

A

Green powder

23
Q

What does iron sulphate look like?

A

Pale green solids

24
Q

What forms when atoms are joined together?

A

Molecules

25
Q

How do you write a chemical formula?

A

Write the chemical symbol for all elements that are present followed by a subscript number to indicate the amount of those atoms. If there is 1 you don’t need a number

26
Q

What happens to the chemical formula if there are millions of atoms present?

A

We use the ratio of the atoms

27
Q

Where does the metal go in a chemical formula?

A

At the beginning

28
Q

What is the chemical formula for nitrogen, hydrogen and chlorine in the ratio 1:4:1?

A

NH4Cl

29
Q

Molecules each containing two carbon atoms, five hydrogen atoms and a bromine atom

A

C2H5Br

30
Q

What elements are in the compound RbNO3?

A

1xRubidium 1xNitrogen 3xOxygen

31
Q

What elements are present in the compound Fe3(Po4)2?

A

3xIron 2xPhosphorus 8xoxygen

32
Q

What is the name of the compound MnSO4?

A

Manganese sulphate

33
Q

What is the name of the compound Na2CrO4?

A

Sodium chromate

34
Q

What is the name of the compound Al(OH)3?

A

Aluminium hydroxide

35
Q

How many bonds do the elements have in group 4 of the periodic table?

A

4 bonds per atom

36
Q

How many bonds do the elements have in group 5 of the periodic table?

A

3 bonds per atom

37
Q

How many bonds do the elements have in group 6 of the periodic table?

A

2 bonds per atom

38
Q

How many bonds do the elements have in group 7 of the periodic table?

A

1 bond per atom

39
Q

How many bonds do the elements have in group 0 of the periodic table?

A

0 bonds

40
Q

How many bonds does hydrogen have?

A

1 bond per atoms

41
Q

What happens if there are only 2 elements and we want to state that there are a certain amount of a particular atom what do we do?

A

We use mono for 1,di for 2, tri for 3, tetra for 4, penta for 5, hexa for 6

Chemistry (3 decks)

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