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Chemistry Quiz 15 (60 MCQs)

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1. The atomic number of an element tells the number of ..... in the nucleus of an atom of that element
2. The smallest part of an element that still has the elemental property
3. Which is an outcome of modern research in chemistry?
4. Balance the following:Fluorine and Aluminum oxide react to produce Aluminum fluoride and Oxygen
5. What is the other name or common name of alkanes?
6. The energy needed to get a reaction started is the
7. Hydrochloric acid
8. They are in the highest energy level of an atom and they are involved in chemical bonding.
9. An element with a charge is an
10. Water consists of .....
11. How many electron can occupy the p orbital?
12. Which of the following has the lowest boiling point?
13. A scientist is working in the lab, with compounds containing carbon. She is most likely working in the field of
14. DNA and RNA are two types of
15. Which of the following intermolecular forces increase with increasing molecular mass?
16. It is an atom with the same number of protons but different number of neutrons.
17. Nail polish remover contains?
18. 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?
19. Which one of the following gas is readily soluble in water at room temperature?
20. Candela is the SI unit of which physical quantity
21. Which would weigh more, a mole of atoms of H or a mole of atoms of He?
22. Two or more atoms linked together to make a substance with unique properties
23. Electrons are ..... in covalent bonds.
24. Anything that cannot be broken down through physical means
25. What is the complete name of the Dutch Chemists in which the other term for intermolecular forces is name after him?
26. Science that deals with matter and energy and the interactions between them.
27. Mass and ..... are always conserved in a chemical reaction.
28. What kind of property results in the substance into changing into a new substance?
29. Water has an unusually high boiling point for a molecular compound because it has
30. How many valence electrons does an atom of chlorine have?
31. How many Hydrogen atoms are in Water (H2O)?
32. The mineral containing both magnesium and calcium is
33. What is the name of group 17?
34. If sugar is added in a water, what happen to the boiling poingt?
35. What is the pure chemical substance that contain one kind of atom only?
36. Atoms have no electric charge because they
37. An atom has an atomic number of 13 and a mass number of 27. It also has a +3 charge. What do you know about this atom?
38. What is used to avoid melting of ice?
39. Pure substance made of only 1 type of molecule
40. Which of the following is the predominant intermolecular force in water?
41. Alloys made with mercury as one metal are called?
42. Super hot and super excited atoms, it is the most common state of matter in universe.
43. Which of the following type of intermolecular forces is present in all substances, regardless of polarity?
44. Which one of these is NOT located in the element square on the Periodic Table?
45. A soda or soft drink is an example of a solution where in .....?
46. A student calculated the % composition of the elements in the compound Pb3(PO4)2 and said that one element represented 16.8%. Which element was this?
47. It explains the properties of solids and liquids in terms of the intermolecular forces of attraction and the kinetic energy of the individual particles.
48. To what does the term valence refer?
49. Which of the following is a covalent bond?
50. It is the total number of protons and neutrons in the nucleus of an atom.
51. What is the difference between O18 and O16
52. How many grams are there in 3.30 x 1023 molecules of N2I6?
53. The main use of salt in the diet is to
54. Sodium will typically ..... electron(s) when forming an ionic bond.
55. The total number of electrons in a neutral atom equals the number of
56. Organic molecules come from ..... things and always contain at least ..... and .....
57. H+ ions are usually found in ..... solutions.
58. Which of the following has the smallest atomic mass?
59. The atomic mass is the number of ..... in the nucleus.
60. What is the nucleus of an atom?
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