2. mmcl2003 1 1111 2222 3333 4444 5555 6666 7777 8888 9999 10 11 12 13 14 15 16 17 18 19 20 21 22 23

3. mmcl2003 2 Write the formula for silver (I) chloride AgCl answer 1

4. mmcl2003 3 What is the valency of iron in iron ( III ) oxide? 3 answer 2

5. mmcl2003 4 How is the valency of a transition metal shown in the names of its compounds? Roman Numerals in brackets eg copper (II) chloride = valency 2 answer 3

6. mmcl2003 5 What is the chemical formula of hydrogen sulphide? answer H2SH2S 4

7. mmcl2003 6 answer CaO What is the chemical formula of calcium oxide? 5

8. mmcl2003 7 What is the valency of the Group 7 elements? answer 1 6

9. mmcl2003 8 answer What is the valency of the Group 2 elements? 2 7

10. mmcl2003 9 H2H2 answer What is the chemical formula of hydrogen? 8

11. mmcl2003 10 CCl 4 answer What is the chemical formula of carbon tetrachloride? 9

12. mmcl2003 11 What is meant by the prefix:- Mono? Mono = 1 ie carbon monoxide molecules contain one oxygen atom (CO) answer 10

13. mmcl2003 12 What is meant by the prefix:- Di? Di = 2 ie carbon dioxide molecules contain two oxygen atoms (CO 2 ) answer 11

14. mmcl2003 13 What is meant by the prefix:- Tri? Tri = 3 ie sulphur trioxide molecules contain three oxygen atoms (SO 3 ) answer 12

15. mmcl2003 14 What is meant by the prefix:- Tetra? Tetra = 4 ie carbon tetrachloride molecules contain four chlorine atoms (CCl 4 ) answer 13

16. mmcl2003 15 How many atoms of each element are present in a molecule of H 2 O? H = 2 O = 1 answer 14

17. mmcl2003 16 answer How many atoms of each element are present in a molecule of C 6 H 12 O 6 ? C = 6 H = 12 O = 6 15

18. mmcl2003 17 Which elements have the most stable electron arrangement? The Noble Gases answer 16

19. mmcl2003 18 Name the compound with the formula N 2 O 4 Dinitrogen tetroxide (tetraoxide) answer 17

20. mmcl2003 19 What type of elements do not normally form bonds with other elements? The Noble Gases answer 18

21. mmcl2003 20 What type of elements bond together to form covalent bonds? Non Metals answer 19

22. mmcl2003 21 What is a molecule? A group of atoms joined together by covalent bonds answer 20

23. mmcl2003 22 Draw a diagram to show the SHAPE of a methane molecule (CH 4 ) answer H H H H C 21 tetrahedral

24. mmcl2003 23 What is the formula for silver (I) dichromate? (You will need to use the Data Book) answer 22 Ag 2 Cr 2 O 7

25. mmcl2003 24 An ionic compound has the formula X 2 O.In what Group of the Periodic Table could the element X be found? answer 23 Group 1 because it’s valency is 1