1. Balance the following equation: WO₃ + H₂ → W + H₂O

Question 1 of 22

2.

Explain, in terms of the arrangement of electrons in its atoms, why neon is very unreactive

Question 2 of 22

3. How can atoms get a full outer shell?

Question 3 of 22

4. What is the formula for aluminium nitrate?

Question 4 of 22

5. What do each of the following state symbols represent: (s), (l), (g), (aq)

Question 5 of 22

6. Explain, in terms of electrons, why isotopes have the same chemical properties

Question 6 of 22

7. Explain the term ionic bond

Question 7 of 22

8. Why do elements in the same group of the periodic table have similar chemical properties?

Question 8 of 22

9. What is special about the elements in group 0?

Question 9 of 22

10. On the Periodic table what is the meaning of the word Group? What does that tell us about the electron configuration of the atom?

Question 10 of 22

11. Explain why magnesium oxide has a higher melting point than sodium chloride.

Question 11 of 22

12. Describe the structure of an ionic compound, e.g NaCl

Question 12 of 22

13. State the formula for the copper (II) ion

Question 13 of 22

14. How many electrons in a chloride ion?

Question 14 of 22

15. State the electron configuration of the fluoride ion

Question 15 of 22

16. What is the formula for magnesium sulfate?

Question 16 of 22

17. State the formula for the iron (II) ion

Question 17 of 22

18. How many electrons in the outer shell of group 4 elements?

Question 18 of 22

19. On the Periodic Table what is the meaning of the word Period? What does that tell us about the electron configuration of the atom?

Question 19 of 22

20. What holds ions together?

Question 20 of 22

21. What is needed to complete this diagram to show the ionic bonding in magnesium chloride, MgCl₂ ?

Question 21 of 22

22. How many electron shells do the elements in the second period have?

Question 22 of 22