1. Question 1 2H 2 + O 2 H 2 O What coefficient is needed to balance this equation? Explain

2. Question 2 5CH 4 + 3O 2 CO 2 + 3H 2 O How many molecules are on the reactants side? Explain

3. Question 3 Write this down as a chemical equation.

4. Question 4 Explain the Law of Conservation of Mass.

5. Question 5 Why is this chemical equation balanced?

6. Question 6 Why is the atomic number of lead 82?

7. Question 7 Why does the Chlorine atom have 18 neutrons?

8. Question 8 How many atoms are in CO 2 ?

9. Question 9 If an atom is balanced, and it has an atomic number of 26 and an atomic mass of 55.847. How many electrons are in this atom.

10. Question 10 Calculate how many neutrons Argon has.

11. Question 11 What period is Calcium on?

12. Question 12 Why is Hydrogen more reactive than Helium?

13. Question 13 How do you know Zirconium is a metal?

14. Question 14 What are the two names of the vertical columns on the Periodic Table?

15. Question 15 What is this number called?

16. Question 16

17. Question 17

18. Question 18

19. Question 19

20. Question 20

21. Question 21

22. Question 22

23. Question 23

24. Question 24

25. Question 25

26. Question 26

27. Question 27

28. Question 28

29. Question 29

30. Question 30