1. An atom is electrically neutral because
a. It has equal numbers of protons and neutrons
b. It has equal numbers of electrons and neutrons
c. It has equal number of protons and electrons
d. It takes part in chemical reactions
e. None of the above[/center]
2. Electrons of the outer shell take part in chemicals reactions.
a. True
b. False
3. Water molecules stick together because of hydrogen bond formed between nearby water molecules. The hydrogen bond is due to the polarity of water molecules
a. True
b. False
4. An ion
a. Is a charged atomic particle with an unequal number of protons and neutrons.
b. Is a charged atomic particle with an equal number of protons and electrons.
c. Is a charged atomic particle with an unequal number of protons and electrons.
d. Is an atom without electrical charge.
e. All of the above
5. Radioisotopes can be detected because
a. They are brightly colored
b. They give out energy that can be tracked
c. They consist of large molecules
d. All of the above
e. None of the above
6. A chemical bond is formed when the atoms that take part in the chemical reaction lose or gain electrons of the innermost electron shell (close to the nucleus).
a. True
b. False
7. In a polar molecule, the atom with a larger atomic number attracts the “shared electrons” more than the atom with a smaller atomic number.
a. True
b. False
8. Acids are called “proton donors” because all acids release hydrogen ions in a solution.
a. True
b. False
9. Water molecules “stick together” or cohere because of the covalent bond between water molecules.
a. True
b. False
10. pH 6 means that a solution is slightly acidic, while pH 14 means that a solution is highly acidic.
a. True
b. False
My answers: 1. C 2. A 3. A 4. C 5. B 6. B 7. B 8. A 9. B 10. B
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