Everything Science Grade 10

CHAPTER 6. CHEMICAL BONDING 6.6

a. calcium

b. iodine

c. hydrogen bromide (HBr)

d. nitrogen dioxide (NO 2 )

5. Given the following Lewis structure, where X and Y each represent a dif-

ferent element:

X Y X

X

ו

ו××

ו

a. What is the valency of X?

b. What is the valency of Y?

c. Which elements could X and Y represent?

6. Complete the following table:

K+ Ca2+ NH+ 4

OH−

O^2 −

NO− 3

PO^34 −

7. Potassium dichromate is dissolved in water.

a. Give the name and chemical formula for each of the ions in solution.

b. What is the chemical formula for potassium dichromate?

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(1.) 002h (2.) 002i (3.) 002j (4.) 002k (5.) 002m (6.) 002n

(7.) 002p

Chemistry: Matter and Materials 123