# 3.3.1.0: Lewis Dot Diagrams (Problems)

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PROBLEM $$\PageIndex{1}$$

Write the Lewis symbols for each of the following ions:

1. As3–
2. I
3. Be2+
4. O2–
5. Ga3+
6. Li+
7. N3–

eight electrons: eight electrons: no electrons

Be2+

eight electrons: no electrons

Ga3+

no electrons

Li+

eight electrons: PROBLEM $$\PageIndex{2}$$

Write the Lewis symbols for the following elements:

1. Cl
2. Na
3. Mg
4. Ca
5. K
6. Br
7. Sr
8. F        PROBLEM $$\PageIndex{3}$$

Write the Lewis symbols of the ions in each of the following ionic compounds and the Lewis symbols of the atom from which they are formed:

a. MgS
b. Al2O3
c. GaCl3
d. K2O
e. Li3N
f. KF      PROBLEM $$\PageIndex{4}$$

In the Lewis structures listed here, M and X represent various elements in the third period of the periodic table. Write the formula of each compound using the chemical symbols of each element:

(a) (b) (c) (d) MgS

AlCl3

Na2S

Al2S3

PROBLEM $$\PageIndex{5}$$

Identify the atoms that correspond to each of the following electron configurations.

a. 1s22s22p5
b. 1s22s22p63s2
c. 1s22s22p63s23p64s23d104p4
d. 1s22s22p63s23p64s23d104p1

F

Mg

Se

Ga