1. How are elements arranged in the periodic table?

Question 1 of 16

2. Describe the formation of a covalent bond

Question 2 of 16

3. Describe the test for ammonia gas

Question 3 of 16

4. What is meant by the term molecule?

Question 4 of 16

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

Question 5 of 16

6. Which particle(s) in an atom has a positive charge?

Question 6 of 16

7. What is the atomic number of a boron atom?

Question 7 of 16

8. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of hydrogen (H₂), how many electrons should be shown in areas 1, 2 and 3?

Question 8 of 16

9. Explain why nitrogen gas, N₂, is a gas at room temperature

Question 9 of 16

10. 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 10 of 16

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

Question 11 of 16

12. Where are metals found on the periodic table?

Question 12 of 16

13. Write the electronic configuration of potassium

Question 13 of 16

14. What colour is hydrated copper (II) sulfate?

Question 14 of 16

15. Why is the boiling point of a larger molecule higher than that of a smaller molecule?

Question 15 of 16

16. Explain how the atoms are held together in a hydrogen bromide molecule

Question 16 of 16