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Chemistry Quiz 9 (25 MCQs)

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1. How many moles of silver atoms are in 1.8 X 1020 atoms of silver?
2. How many moles are 2.85 x 1018 atoms of iron?
3. Hydrogen and nitrogen form
4. What is two or more atoms held together by chemical bonds?
5. If an atom has 3 electrons, how many protons does it have?
6. What electron configuration matches an oxygen ion?
7. What electron configuration matches an oxygen atom?
8. Elements in Group 18 do not normally form chemical bonds because _____
9. What are the four biological molecules?
10. The atomic number of an element is equal to the number of
11. What is the country that contains 7, 641 island?
12. What element is located in group 13, period 5
13. Which type of intermolecular force may be present between amine molecules? i. hydrogen bondii. Van der Waalsiii. covalent
14. Bonus Question:What color is blood inside your body?
15. Which statement best describes an element?
16. If fluorine is stronger then carbon, what charge will the fluorine receive?
17. A type of mixture that is intermediate to a solution and a suspension
18. How many H2O molecules can form hydrogen bonds with one H2O molecule?
19. This lipid consists of three fatty acid molecules bonded to a glycerol molecule
20. How many molecules in 2 moles of methane (CH4)?
21. The results of testing a colorless solution with three indicators are shown in the table below. Which formula could represent the solution tested? Indicator ResultRed Litmus stays RedBlue Litmus turns Redphenolphthalein clear
22. What are the 3 states of matter?
23. If a substance contains a lot of H+ (protons), then it will be _____
24. Who proposed an atomic model that shows electrons move in concentric orbit around the nucleus?
25. State the number of atoms present in 1mole of He
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