2. Calderglen High School 1111 2222 3333 4444 5555 6666 7777 8888 9999 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

3. Calderglen High School Write the formula for silver (I) chloride AgCl answer 1

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

5. Calderglen High School 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. Calderglen High School What is the chemical formula of hydrogen sulphide? answer H2SH2S 4

7. Calderglen High School answer CaO What is the chemical formula of calcium oxide? 5

8. Calderglen High School What is the valency of the Group 7 elements? answer 1 6

9. Calderglen High School answer What is the valency of the Group 2 elements? 2 7

10. Calderglen High School H2H2 answer What is the chemical formula of hydrogen? 8

11. Calderglen High School CCl 4 answer What is the chemical formula of carbon tetrachloride? 9

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

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

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

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

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

17. Calderglen High School 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. Calderglen High School Which elements have the most stable electron arrangement? The Noble Gases answer 16

19. Calderglen High School Name the compound with the formula N 2 O 4 Dinitrogen tetroxide (tetraoxide) answer 17

20. Calderglen High School What type of elements do not normally form bonds with other elements? The Noble Gases answer 18

21. Calderglen High School What type of elements bond together to form covalent bonds? Non Metals answer 19

22. Calderglen High School What is a molecule? A group of atoms joined together by covalent bonds answer 20

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

24. Calderglen High School What is the formula for copper(II) Nitrate? (You will need to use the Data Book) answer 22 Cu 2 (NO 3 ) 1 Answer - Cu(NO 3 ) 2

25. Calderglen High School 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

26. Calderglen High School What is the molecular formula for this molecule? answer 24 C2H6OC2H6OC2H6OC2H6O C C H H H H H H O

27. Calderglen High School What is the correct formula for this molecule? answer 25 CHCl 3 C Cl H