2. The chlorine atom gains seven electrons when it becomes an ion.

3. A) NaCl B) ClNa C) Na 7 Cl 1 D) SCl

4. A) ZnN B) Zn 2 N C) Zn 3 N 2 D) ZnN 2 E) Zn 2 N 3 F) ZnN 3

5. A) Anions B) Cations C) Valence electrons D) Orbital electrons

6. A) Negative two B) Positive two C) IDK D) Positive one

7. A) None B) One C) Six D) eight

8. A cation is positively charged because it will gain electrons to have a stable electron configuration like a noble gas.

9. The spirit colors at SEHS are red, white, and blue.

10.  The charge of an anion is negative.

11. A) 1s 2 2s 2 2p 5. B) the same as that of the neon atom. C) 1s 2 2s 2 2p 6 3s 1. D) the same as that of a potassium ion.

12. a. form crystal lattices. b. contain positive ions. c. contain mobile valence electrons. d. form ionic bonds.

13. a. 2+c. 3+ b. 2–d. 1+

14. A) nitrate ion. B) nitric ion. C) nitride ion. D) nitrite ion.

15.  aIt gains 2 electrons.  bIt does not change its number of electrons.  cIt gives up 2 electrons.  dCalcium does not obey the octet rule.

16.  What is the net charge of the ionic compound calcium fluoride?  a2–  b0  c1–  d1

17.  What is the formula unit of sodium nitride?  aNa 3 N  bNaN 3  cNa 2 N  dNaN 2

18.  A.their properties are often superior to those of their component elements.  B.they are less expensive to produce than their component elements.  C.they never corrode.  D.their properties are a blend of their component elements.

19.  What characteristic of metals makes them good electrical conductors?  A.They have mobile cations.  B.They have mobile valence electrons  C.They have mobile protons.  D. Their crystal structures can be rearranged easily.