Science End Of Year 9

Question 1

What is an element

Answer 1

What all substances are made up of, and which contain only one type of atom

Question 2

What is an atom

Answer 2

The smallest particle of an element that can exist

Question 3

What is a molecule

Answer 3

Two to thousands of atoms joined together. Most non - metals exist either as small or giant molecules

Question 4

What is a compound

Answer 4

A pure substance made up of two or more elements strongly joined (boned) together

Question 5

What is a chemical symbol

Answer 5

A one or two letter code used to identify an element

Question 6

What is a polymer

Answer 6

A molecule made of thousands of smaller molecules in a repeating pattern. They can be natural or synthetic (man-made)

Question 7

What is a periodic table

Answer 7

A table that contains all of the known elements. It groups together elements with similar properties

Question 8

What is a chemical formula

Answer 8

Shows the elements present in a compound and their relative proportions

Question 9

What is the symbol for hydrogen

Answer 9

H

Question 10

What is the symbol for oxygen

Answer 10

O

Question 11

What is the symbol for nitrogen

Answer 11

N

Question 12

What is the symbol for carbon

Answer 12

C

Question 13

What is the symbol for iron

Answer 13

Fe

Question 14

What is the symbol for zinc

Answer 14

Zn

Question 15

What is the symbol for copper

Answer 15

Cu

Question 16

What is the symbol for Sulfur

Answer 16

S

Question 17

What is the symbol for aluminium

Answer 17

AI

Question 18

What is the symbol for iodine

Answer 18

I

Question 19

What is the symbol bromine

Answer 19

Br

Question 20

What is the symbol for chlorine

Answer 20

CI

Question 21

What is the symbol sodium

Answer 21

Na

Question 22

What is the symbol for potassium

Answer 22

K

Question 23

What is the symbol for magnesium

Answer 23

Mg

Question 24

How many elements does the periodic table contain

Answer 24

The periodic table contains over 100 different elements and their chemical symbols

Question 25

What does hydroxide contain

Answer 25

It includes hydrogen and oxygen atoms. The formula for sodium hydroxide is NaOH

Question 26

What does nitrate contain

Answer 26

Nitrate includes nitrogen and oxygen atoms. The formula for sodium nitrate is NaNO3

Question 27

What does sulfate contain

Answer 27

Sulfate includes Sulfate and oxygen atoms. The formula for copper Sulfate is CuSO4

Question 28

What does carbonate contain

Answer 28

Carbonate includes carbon and oxygen atoms. The formula for calcium carbonate is CaCO3

Question 29

What does oxide contain

Answer 29

Oxide incudes oxygen and another element. The name changes depending how many oxygen atoms are present carbon monoxide (CO - 1oxygen atom) carbon dioxide (CO2 - 2 oxygen atoms) Sulfur trioxide (SO3- 3 oxygen atoms)