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Chemistry Quiz 35 (25 MCQs)

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1. What is the number of signifiant digits present in0.01025
2. A H2O molecule is bonded by what kind of bond?
3. What determines the order of placement of the elements on the modern Periodic Tables?
4. A chemical symbol always begins with a
5. What is a biological molecule?
6. Represents all the known elements _____
7. Which of these is a mixture?
8. At what pH level would both Bromthymol blue and Bromcresol green be yellow?
9. A solution that contains the maximum amount of solute that a given quantity of a solvent can dissolve
10. A homogeneous mixture is a
11. A substance will have stronger London dispersion forces if it has
12. What does an enzyme do?
13. RNA stands for what?
14. What is the mass of one mole of potassium (K)?
15. Which of the following would be considered a combustion reaction?
16. It is anything that has mass and takes up space
17. The ejection of electrons when a metal surface is irradiated is known as
18. A sample of Strontium 88 has a atomic number of 38 and an ion charge of +2. How many protons are in an atom of Strontium 88?
19. A small quantity of salt is stirred into a liter of water until it dissolves. In the resulting mixture, the salt is
20. Brain Teaser:A magnesium atom has an atomic number of 12, an atomic mass of 25, and a +2 charge. This atom would contain _____ protons, _____ neutrons, and _____ electrons.
21. Atomic number is equal to
22. Mary wants to get the iron filings out of some fine sand, what could be used to separate these two solids?
23. How many dots does the electron-dot diagram of nitrogen have?
24. An arrangement of the elements according to their atomic numbers so that elements with similar properties are in the same column and properties repeat from row to row
25. Which is not a type of elements?
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