Chemistry Quiz 24 (25 MCQs)

Quiz Instructions:

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1. Oxygens atomic number is 8. this means that an oxygen atom has

2. A charged atom that has gained or lost electrons is known as a(n) _____

3. Who isolated oxygen gas, which he called "dephlogisticated air" by heating mercury oxide (HgO)?

4. Which region of an atom has a negative charge?

5. An acid is a molecule that releases (donates) _____

6. Petroleum is found in?

7. How many joules are required to boil 75 grams of water?

8. Being able to pull metal into thin wires

9. A positively or negatively charged atom.

10. Charged particles.

11. A 22.4-L sample of which of the following substances, at STP, would contain 6.02 X 1023 representative particles?

12. The inherited traits of an organism are controlled by

13. What is the meaning of + used in a chemical equation?

14. No attractive force between particles

15. Energy is _____ when bonds break.

16. Convert 436 K to degrees Celsius.

17. What cells cause blood to clot?

18. The first energy level can hold up to how many electrons?

19. The central region of an atom where its neutrons and protons are is called

20. A heterogeneous mixture can be separated by all of the following methods EXCEPT _____

21. An atom with extra neutrons in its nucleus is called a/an _____

22. The major theory of reaction rate is called

23. If the atomic number is 10 and the atomic mass is 23.10, how many protons does that atom have?

24. What do you call the table of elements?

25. Chemical bonding occurs so that atoms can