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Chemistry Quiz 31 (25 MCQs)

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1. An atom that has lost an electron and now has a positive charge is an ion called
2. How many atoms of lead are in one mole of lead?
3. Created the Planetary Model of the atom
4. A mixtures that has uniform composition
5. What type of protein promotes catalyze reactions such as synthesis, decomposition, energy productions and/or cellular reproduction?
6. As the concentration of hydrogen ions (H+) increases, the
7. The atomic number of an element tells the number of _____ in the nucleus of an atom of that element
8. The smallest part of an element that still has the elemental property
9. Which is an outcome of modern research in chemistry?
10. Balance the following:Fluorine and Aluminum oxide react to produce Aluminum fluoride and Oxygen
11. What is the other name or common name of alkanes?
12. The energy needed to get a reaction started is the
13. They are in the highest energy level of an atom and they are involved in chemical bonding.
14. An element with a charge is an
15. Water consists of _____
16. How many electron can occupy the p orbital?
17. Which of the following has the lowest boiling point?
18. A scientist is working in the lab, with compounds containing carbon. She is most likely working in the field of
19. DNA and RNA are two types of
20. Which of the following intermolecular forces increase with increasing molecular mass?
21. It is an atom with the same number of protons but different number of neutrons.
22. Nail polish remover contains?
23. A sample of acid has a proton concentration 1, 000 times greater than pure water. A sample of base has a proton concentration 10, 000 times less than pure water. What is the approximate pH of two samples?
24. Which one of the following gas is readily soluble in water at room temperature?
25. Candela is the SI unit of which physical quantity
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