1. Answers to Quiz 5G

2. 1.ANS:polyatomic 2.ANS:ions 3.ANS:zero or neutral 4.ANS:B5.ANS:A 6.ANS:C7.ANS:D 8.ANS:C9.ANS:B 10.ANS:C11.ANS:D 12.ANS:D 13.ANS:A

3. 14.ANS: A covalent bond is formed when two atoms share valence electrons. Neither atom loses electrons or takes electrons from the other. No charged particles form. In an ionic bond, one or more electrons leave or are gained by atoms. Atoms that lose electrons become positively charged ions, and atoms that gain electrons become negatively charged ions. These oppositely charged particles then attract each other.

4. 15.ANS: Two. Atoms of elements in Group 17 form ions with a charge of 1–, and atoms of elements in Group 2 form ions with a charge of 2+. It would take two ions of a Group 17 element to balance the charge of one ion of a Group 2 element 16.ANS: From Group 1 to Group 2, the number of electrons in each kind of atom increases by one in each period. This is the case because the number of protons (atomic number) increases by one from Group 1 to Group 2, and atoms have equal numbers of electrons and protons.

5. 17.ANS:Group 2 18.ANS:Three. Elements in Group 13 have 3 valence electrons.