1. In the test of a gas, a lit splint gives a squeaky pop. What is the gas?

Question 1 of 16

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

Question 2 of 16

3. What is meant by the term molecule?

Question 3 of 16

4. What is the relative atomic mass (Aᵣ) of a helium atom?

Question 4 of 16

5. 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 5 of 16

6.

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

Question 6 of 16

7. In the dot and cross diagram of the outer electrons showing the covalent bonding in a molecule of chlorine (Cl₂), how many electrons should be shown in areas 1, 2 and 3?

Question 7 of 16

8. Do larger molecules have higher or lower boiling points than smaller molecules?

Question 8 of 16

9. How many electrons in the outer shell of group 2 elements?

Question 9 of 16

10. Explain why methane gas, CH₄, is a gas at room temperature

Question 10 of 16

11. Describe the formation of a covalent bond

Question 11 of 16

12. Describe the chemical test for water

Question 12 of 16

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

Question 13 of 16

14. Give the definition of a covalent bond

Question 14 of 16

15. Where are the transition metals on the Periodic Table?

Question 15 of 16

16. State the mass and charge of a neutron

Question 16 of 16


 

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