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Chemistry Quiz 10 (25 MCQs)

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1. Most of the mass in an atom is concentrated in the _____

2. The valence electrons of fluorine ( F ) atom is _____

3. How many moles are in 15 grams of lithium?

4. What do you call the experiment used by JJ Thomson in discovering electron.

5. The nucleus of an atom contains _____ and _____

6. Which one of the following metals does not react with water to produce Hydrogen?

7. When an atom gains a valence electron, it becomes a(n) _____ ion.

8. A conversion factor derived from the coefficients of a balanced chemical equation interpreted in term of mole.

9. Condensing means transforming from gas to _____

10. When an atom loses an electron, it

11. What does a buffer do?

12. Which of the following compounds has ONLY covalent bonds?

13. Molar mass is defined as

14. A process which separates two liquids based on differences in their boiling points is

15. The attraction between molecules of the same kind is known as _____

16. Why is deuterium 2H1 sometimes called heavy hydrogen?

17. Why do sugar particles dissolve faster in hot water?

18. How many grams are there in 7.40 moles of AgNO3?

19. Calculate the mass percent of solution, if there is 100 g of sugar and 400 g of water

20. What is the smallest unit of an element that still retains its properties?

21. "Like dissolves like" refers to compounds with

22. Is a phenomenon observed in diapered colloid particles once light is directed to such mixtures

23. If an aluminum atom has 13 protons (+) and 10 electrons (-), what is it's charge?

24. What is the number of protons in iron-56?

25. Suppose you have two white powders (Baking powder and baking soda) an you want to distinguish the two. How would you identify the given materials without tasting them?

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Chemistry Quiz 10 (25 MCQs)

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