Question

1. which is not a unit of measurement in the metric system? a. meter c. liter b. ounce d. gram
2. the basic unit of mass in si is the a. meter c. liter b. ounce d. gram
3. the three particles that make up atoms are a. protons, neutrons, and isotopes. c. positives, negatives, and electrons. b. neutrons, isotopes, and electrons. d. protons, neutrons, and electrons.
4. the space surrounding the nucleus of an atom contains a. protons. c. neutrons. b. electrons. d. ions.
5. the nucleus is made up of a. protons and electrons. c. protons and neutrons. b. electrons and neutrons. d. protons, neutrons, and electrons.
6. if an atom contains 11 protons and 12 neutrons, its atomic number is a. 1. c. 12. b. 11. d. 23.
7. which of the following makes up a molecule of water? a. one atom of hydrogen and one atom of oxygen b. one atom of sodium and one atom of chlorine c. one atom of hydrogen and two atoms of oxygen d. two atoms of hydrogen and one atom of oxygen
8. a covalent bond is formed as the result of a. transferring electrons. c. transferring protons. b. sharing an electron pair. d. sharing a proton pair.
9. what type of ion forms when an atom loses electrons? a. neutral c. negative b. positive d. possibly positive or negative
10. what type of ion forms when an atom gains electrons? a. neutral c. negative b. positve d. possibly positive or negative
11. the most abundant compound in most living things is a. carbon dioxide. c. sodium chloride. b. water. d. sugar.
12. water molecules are polar, with the a. oxygen side being slightly positive and the hydrogen side being slightly negative. b. oxygen and hydrogen sides being slightly positive. c. oxygen and hydrogen sides being slightly negative. d. oxygen side being slightly negative and the hydrogen side being slightly positive.

Explanation:

Step1: Recall atomic structure knowledge

The three particles that make up atoms are protons, neutrons, and electrons. So for question 15, the answer is d.

Step2: Recall electron - location knowledge

The space surrounding the nucleus of an atom contains electrons. So for question 16, the answer is b.

Step3: Recall nucleus - composition knowledge

The nucleus is made up of protons and neutrons. So for question 17, the answer is c.

Step4: Recall atomic - number definition

The atomic number is equal to the number of protons. If an atom contains 11 protons and 12 neutrons, its atomic number is 11. So for question 18, the answer is b.

Step5: Recall water - molecule composition

A molecule of water is made up of two atoms of hydrogen and one atom of oxygen. So for question 19, the answer is d.

Step6: Recall covalent - bond definition

A covalent bond is formed as the result of sharing an electron pair. So for question 20, the answer is b.

Step7: Recall ion - formation knowledge

When an atom loses electrons, it forms a positive ion. So for question 21, the answer is b.

Step8: Recall ion - formation knowledge

When an atom gains electrons, it forms a negative ion. So for question 22, the answer is c.

Step9: Recall abundant - compound knowledge

The most abundant compound in most living things is water. So for question 23, the answer is b.

Step10: Recall water - polarity knowledge

Water molecules are polar, with the oxygen side being slightly negative and the hydrogen side being slightly positive. So for question 24, the answer is d.

Answer:

1. d. protons, neutrons, and electrons
2. b. electrons
3. c. protons and neutrons
4. b. 11
5. d. two atoms of hydrogen and one atom of oxygen
6. b. sharing an electron pair
7. b. positive
8. c. negative
9. b. water
10. d. oxygen side being slightly negative and the hydrogen side being slightly positive