Chemistry – CHEM Final Exam Review, WWU, Academic Year 2026 – Comprehensive Questions with Answers

Chemistry – CHEM Final Exam Review, WWU, Academic Year 2026 –
Comprehensive Questions with Answers


which symbol would be written first in the formula for the compound formed from each of the
following pairs of elements:

a. S and Cu

b. Bi and S

c. N and Nb

d. C and Mg

e. Ta and Cl

f. Al and As - correct answer ✔✔ a. Cu

b. Bi

c. Nb

d. Mg

e. Ta

f. Al



define ion - correct answer ✔✔ an atom or molecule with a net electric charge due to the loss
or gain of one or more electrons



define cation - correct answer ✔✔ positively charged ion



define anion - correct answer ✔✔ negatively charged ion



what is the charge of an atom of calcium? - correct answer ✔✔ neutral



what is the charge of an ion of calcium? - correct answer ✔✔ +2

, which elements would be placed first in the formula for the compound formed from each of the
following pairs of elements:

a. oxygen, copper

b. sulfur, potassium

c. lithium, fluorine

d. calcium, nitrogen

e. sodium, chlorine

f. magnesium, bromine - correct answer ✔✔ a. copper

b. sulfur

c. lithium

d. calcium

e. sodium

f. magnesium



write the formula for the compound made from calcium and the phosphate ion. - correct
answer ✔✔ Ca2(Po4)2



write the formulas for the following compounds.

a. calcium sulfate

b. potassium perchlorate

c. silver nitride

d. calcium bromide

e. boron phosphide

f. strontium nitrite - correct answer ✔✔ a. CaSo4

b. KClO4

c. Ag3N