1. Explain why atoms are neutral

Question 1 of 16

2. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of methane (CH₄), how many electrons should be shown in areas 1, 2, 3, and 4?

Question 2 of 16

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

Question 3 of 16

4. What are the elements in group 0 called?

Question 4 of 16

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

Question 5 of 16

6. On the Periodic Table what is the meaning of the word Period?

Question 6 of 16

7. What colour is anhydrous copper (II) sulfate?

Question 7 of 16

8. Where are metals found on the periodic table?

Question 8 of 16

9. If a substance has a simple molecular structure, what physical state might it be at room temperature?

Question 9 of 16

10. What is meant by the term atom?

Question 10 of 16

11. How many electrons in an argon atom?

Question 11 of 16

12. Describe the formation of a covalent bond

Question 12 of 16

13. 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 13 of 16

14. How many protons in a silicon atom?

Question 14 of 16

15. Describe the test for hydrogen gas

Question 15 of 16

16. Why is the melting point of a smaller molecule lower than that of a larger molecule?

Question 16 of 16