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Science > Chapter 7 - Elements, Compounds and Mixtures > Flashcards

Chapter 7 - Elements, Compounds and Mixtures Flashcards

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0
Q

Helium

A

He

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1
Q

Hydrogen

A

H

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2
Q

Lithium

A

Li

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3
Q

Beryllium

A

Be

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4
Q

Boron

A

B

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5
Q

Carbon

A

C

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6
Q

Nitrogen

A

N

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7
Q

Oxygen

A

O

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8
Q

Fluorine

A

F

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9
Q

Neon

A

Ne

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10
Q

Sodium

A

Na

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11
Q

Magnesium

A

Mg

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12
Q

Aluminium

A

Al

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13
Q

Silicon

A

Si

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14
Q

Phosphorus

A

P

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15
Q

Sulfur

A

S

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16
Q

Chlorine

A

Cl

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17
Q

Argon

A

Ar

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18
Q

Potassium

A

K

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19
Q

Calcium

A

Ca

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20
Q

Iron

A

Fe

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21
Q

Zinc

A

Zn

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22
Q

Copper

A

Cu

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23
Q

Lead

A

Pb

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24
Q

Silver

A

Ag

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25
Q

Gold

A

Au

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26
Q

Mercury

A

Hg

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27
Q

Water

A

H20

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28
Q

Carbon Dioxide

A

CO2

29
Q

Sulphur Dioxide

A

SO2

30
Q

Common Salt

A

NaCl

31
Q

Methane Gas

A

CH4

32
Q

Ammonia

A

NH4

33
Q

Hydrochloric Acid

A

HCl

34
Q

Sulphuric Acid

A

H2SO4

35
Q

Calcium Carbonate

A

CaCO3 (limestone)

36
Q

Oxygen Gas

A

O2

37
Q

Chlorine Gas

A

Cl2

38
Q

Hydrogen Gas

A

H2

39
Q

Nitrogen Gas

A

N2

40
Q

Uranium

A

U

41
Q

What is an element?

A

Contain only one type of atom.

42
Q

What is a compound?

A

Two or more different types of atoms bonded together (can’t separate)

43
Q

What is a mixture?

A

Two or more elements, two or more compounds or a combination of both. (Can separate)

44
Q

What is a molecule?

A

Two or mor atoms joined together.

45
Q

What is an alchemist?

A

An olden day chemist you mixed chemicals and tried to change metals into gold.

46
Q

What is a scientist?

A

People skilled in working in the fields of science. They observe and investigate.

47
Q

How many natural atoms are there?

A

92

48
Q

What are electrons?

A

Very light, negatively charged particles inside an atom. Move around nucleus.

49
Q

What are protons?

A

Tiny, but heavy particle found in the nucleus. Have a positive charge.

50
Q

What is a nucleus?

A

Central part of an atom. Made up of protons and neutrons.

51
Q

What are neutrons?

A

Tiny, but heavy found in the nucleus. No charge.

52
Q

Atomic Number?

A

Number of protons in the nucleus.

53
Q

Mass Number?

A

Number of Protons + Neutrons.

54
Q

How can elements be separated from compounds?

A

Burning, mixing or electricity.

55
Q

How can water be split?

A

Electricity. It splits into Hydrogen and Oxygen.

56
Q

Properties of metals?

A

Solid at room temp, polished, good conductors of heat and electricity, bent into a variety of shapes (malleable), made into wire (ductile), melt at high temps.

57
Q

Properties of Non Metals?

A

Not polished, brittle, not malleable, poor conductors, melt at low temps.

58
Q

Metalloids?

A

Properties of metals and non metals. Along zig, zag line! Silicon.

59
Q

How many groups are there?

A

18

60
Q

How many periods are there?

A

7

61
Q

Group 1?

A

Alkali metals

62
Q

Group 2

A

Alkaline earth metals

63
Q

Middle?

A

Transition metals

64
Q

Group 17?

A

Halogens

65
Q

Group 18

A

Noble Gases

66
Q

Right?

A

Non Metals.

67
Q

Left?

A

Metals.

68
Q

Molecules?

A

Two or more atoms joined together.

69
Q

What is carbon found in?

A

Diamonds, graphite, amorphous carbon.

70
Q

What are three fuels?

A

Coal, Oil, Carbon Dioxide

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