1. A Review of General Chemistry

Which of the atoms in the molecular models in [Problem 20] have

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a. three lone pairs?

b. two lone pairs?

c. one lone pair?

d. no lone pairs?

a. Find potassium (K) in the periodic table and predict how many valence electrons it has.

b. What orbital does the unpaired electron occupy?

Look at the relative positions of each pair of atoms listed here in the periodic table. How many core electrons does each have? How many valence electrons does each have?

a. carbon and silicon

b. oxygen and sulfur

How many valence electrons do the following atoms have?

a. boron

b. nitrogen

How many valence shell electrons do each of the following elements contain? How many new bonds can each form?

(c) O

How many valence shell electrons do each of the following elements contain? How many new bonds can each form?

(b) N

How many valence shell electrons do each of the following elements contain? How many new bonds can each form?

(a) C

Give the charge most likely to result from ionization of the following metals.

(a) Lithium

Give the charge most likely to result from ionization of the following nonmetals.

(b) Sulfur

Fill in the blank. Oxygen ionizes to become ― 2 instead of ― 1 because O^2- is more ___________   .

Draw in all missing lone pairs for the following molecules.

(c)

Draw in all missing lone pairs for the following molecules.

(b)

Modify the following line-angle drawings to show all lone pairs.

(b)