Compounds

Question 1

What is a compound?

Answer 1

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

Question 2

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

Answer 2

At the beginning

Question 3

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

Answer 3

The ending changes to ide

Question 4

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

Answer 4

We call it a metal hydroxide

Question 5

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

Answer 5

the ending changes to ate

Question 6

What is the compound name for iodine and sodium?

Answer 6

sodium iodide

Question 7

What is the compound name for oxygen, potassium and bromine

Answer 7

Potassium Bromate

Question 8

What is the compound name for hydrogen, calcium and oxygen

Answer 8

calcium hydroxide

Question 9

What elements are in calcium carbide?

Answer 9

Calcium and carbon

Question 10

What elements are in potassium nitrate

Answer 10

Potassium, nitrogen and oxygen

Question 11

What elements are in sodium hydroxide?

Answer 11

Sodium, hydrogen and oxygen

Question 12

What does copper look like?

Answer 12

shiny red-brown solids

Question 13

What does oxygen look like?

Answer 13

Colourless gas

Question 14

What does silicon look like?

Answer 14

Shiny black solid

Question 15

What does sulphur look like?

Answer 15

Yellow powder

Question 16

What does iron look like?

Answer 16

Shiny grey solids

Question 17

What does carbon look like?

Answer 17

Black powder

Question 18

What does copper oxide look like?

Answer 18

Black/red powder

Question 19

What does silicon dioxide look like?

Answer 19

White powder

Question 20

What does copper sulphate look like?

Answer 20

Blue powder

Question 21

What does iron sulphide look like?

Answer 21

Dull grey solid

Question 22

What does copper carbonate look like?

Answer 22

Green powder

Question 23

What does iron sulphate look like?

Answer 23

Pale green solids

Question 24

What forms when atoms are joined together?

Answer 24

Molecules

Question 25

How do you write a chemical formula?

Answer 25

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

Question 26

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

Answer 26

We use the ratio of the atoms

Question 27

Where does the metal go in a chemical formula?

Answer 27

At the beginning

Question 28

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

Answer 28

NH4Cl

Question 29

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

Answer 29

C2H5Br

Question 30

What elements are in the compound RbNO3?

Answer 30

1xRubidium 1xNitrogen 3xOxygen

Question 31

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

Answer 31

3xIron 2xPhosphorus 8xoxygen

Question 32

What is the name of the compound MnSO4?

Answer 32

Manganese sulphate

Question 33

What is the name of the compound Na2CrO4?

Answer 33

Sodium chromate

Question 34

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

Answer 34

Aluminium hydroxide

Question 35

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

Answer 35

4 bonds per atom

Question 36

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

Answer 36

3 bonds per atom

Question 37

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

Answer 37

2 bonds per atom

Question 38

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

Answer 38

1 bond per atom

Question 39

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

Answer 39

0 bonds

Question 40

How many bonds does hydrogen have?

Answer 40

1 bond per atoms

Question 41

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?

Answer 41

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