Elements Compounds and MIxtures Flashcards

1
Q

What is an ELEMENT?

A

An element is a substance that consiste of only one type of atom and cannot be broken down into sompler substances by chemical means.

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2
Q

What is an ATOM?

A

The smallest part of an element.

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3
Q

Name the element:
H

A

Hydrogen

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4
Q

He

A

Helium

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5
Q

Li

A

Lithium

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6
Q

Be

A

Beryllium

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7
Q

B

A

Boron

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8
Q

C

A

Carbon

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9
Q

N

A

Nitrogen

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10
Q

O

A

Oxygen

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11
Q

F

A

Fluorine

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12
Q

Ne

A

Neon

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13
Q

Sodium

A

Na

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14
Q

Magnesium

A

Mg

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15
Q

Aluminium

A

Al

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16
Q

Silicon

A

Si

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17
Q

Phosphorus

A

P

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18
Q

Sulphur

A

S

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19
Q

Chlorine

A

Cl

20
Q

Argon

A

A

21
Q

Potassium

A

P

22
Q

Calcium

A

C

23
Q

Iron

A

Fe

24
Q

Silver

A

As

25
Q

Gold

A

Au

26
Q

Mercury

A

Hg

27
Q

Copper

A

Cu

28
Q

Zinc

A

Zn

29
Q

Name 3 physical properties of metals.

A

Shiny/lustrous
Malleable
Sonorous
Ductile
High melting point

30
Q

What does MALLEABLE mean?

A

can be hammered into shape

31
Q

What does SONOROUS mean?

A

Rings when struck

32
Q

What does DUCTILE mean?

A

can be drawn out into wires

33
Q

Name 2 properties of non-metals.

A

Dull
Poor conductors of electricity

34
Q

Which NON-METAL is a good conductor of electricity?

A

graphite

35
Q

What is a COMPOUND?

A

A compound is a substance that consists of 2 or more different elements chemically bonded together.

36
Q

complete:
magnesium + oxygen

A

magnesium oxide

37
Q

Describe how magnesium burns in air.

A

grey solid at start
burns with a bright light
forms a white ash

38
Q

Describe how iron wool burns

A

grey solid
burns with orange sparks
forms a black solid

39
Q

What is a moecule?

A

2 or more atoms chemically bonded together.

40
Q

A;; compounds are made up of molecules.
True or False

A

True

41
Q

Give an example of a compound.

A

H2O

42
Q

What is a mixture?

A

Consists of 2 or more different substances that are not chemicslly bonded and can be easily separated.

43
Q

Name 3 methods of separation:

A

Distillation
Filtration
Evaporation
Seaparating funnel
Chromatography

44
Q

What is an ALLOY?

A

A mixture of 2 or more elements, at least one of which is a metal, and the resulting mixture has metallic properties.

45
Q

Brass is an alloy. What is it made up of?

A

Cu and Zn (2 metals)

46
Q

Steel

A