Elements Compounds and MIxtures

Question 1

What is an ELEMENT?

Answer 1

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

Question 2

What is an ATOM?

Answer 2

The smallest part of an element.

Question 3

Name the element:
H

Answer 3

Hydrogen

Question 4

He

Answer 4

Helium

Question 5

Li

Answer 5

Lithium

Question 6

Be

Answer 6

Beryllium

Question 7

B

Answer 7

Boron

Question 8

C

Answer 8

Carbon

Question 9

N

Answer 9

Nitrogen

Question 10

O

Answer 10

Oxygen

Question 11

F

Answer 11

Fluorine

Question 12

Ne

Answer 12

Neon

Question 13

Sodium

Answer 13

Na

Question 14

Magnesium

Answer 14

Mg

Question 15

Aluminium

Answer 15

Al

Question 16

Silicon

Answer 16

Si

Question 17

Phosphorus

Answer 17

P

Question 18

Sulphur

Answer 18

S

Question 19

Chlorine

Answer 19

Cl

Question 20

Argon

Answer 20

A

Question 21

Potassium

Answer 21

P

Question 22

Calcium

Answer 22

C

Question 23

Iron

Answer 23

Fe

Question 24

Silver

Answer 24

As

Question 25

Gold

Answer 25

Au

Question 26

Mercury

Answer 26

Hg

Question 27

Copper

Answer 27

Cu

Question 28

Zinc

Answer 28

Zn

Question 29

Name 3 physical properties of metals.

Answer 29

Shiny/lustrous Malleable Sonorous Ductile High melting point

Question 30

What does MALLEABLE mean?

Answer 30

can be hammered into shape

Question 31

What does SONOROUS mean?

Answer 31

Rings when struck

Question 32

What does DUCTILE mean?

Answer 32

can be drawn out into wires

Question 33

Name 2 properties of non-metals.

Answer 33

Dull Poor conductors of electricity

Question 34

Which NON-METAL is a good conductor of electricity?

Answer 34

graphite

Question 35

What is a COMPOUND?

Answer 35

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

Question 36

complete: magnesium + oxygen

Answer 36

magnesium oxide

Question 37

Describe how magnesium burns in air.

Answer 37

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

Question 38

Describe how iron wool burns

Answer 38

grey solid burns with orange sparks forms a black solid

Question 39

What is a moecule?

Answer 39

2 or more atoms chemically bonded together.

Question 40

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

Answer 40

True

Question 41

Give an example of a compound.

Answer 41

H2O

Question 42

What is a mixture?

Answer 42

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

Question 43

Name 3 methods of separation:

Answer 43

Distillation Filtration Evaporation Seaparating funnel Chromatography

Question 44

What is an ALLOY?

Answer 44

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

Question 45

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

Answer 45

Cu and Zn (2 metals)

Question 46

Steel