$$40.08 + 2 \times 35.45 = 110.98$$

Question 1

Which of the following ions is formed when a chlorine atom gains one electron?

Accepted Answer

$$\mathrm{Cl^-}$$

Question 2

What is the correct formula for the ionic compound formed between magnesium and nitrate?

Accepted Answer

$$\mathrm{Mg(NO_3$)_2}$$

Question 3

Which of the following best describes the bond in a molecule of $$\mathrm{H_2O}$$?

Accepted Answer

Polar covalent bond

Question 4

A compound is formed between calcium and phosphate. What is its correct chemical formula?

Accepted Answer

$$\mathrm{Ca_3$(PO_4$)_2}$$

Question 5

Which of the following molecules is nonpolar?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 6

What is the name of the compound $$\mathrm{Fe_2O_3}$$?

Accepted Answer

Iron(III) oxide

Question 7

Which of the following ions is a polyatomic ion?

Accepted Answer

$$\mathrm{NO_3$^-}$$

Question 8

What is the correct name for $$\mathrm{K_2SO_4}$$?

Accepted Answer

Potassium sulfate

Question 9

Which of the following best explains why sodium forms a $$+1$$ ion?

Accepted Answer

It loses one electron to achieve an octet.

Question 10

What is the formula for ammonium carbonate?

Accepted Answer

$$\mathrm{(NH_4$)_2CO_3}$$

Question 11

Which of the following compounds contains a transition metal with a variable charge?

Accepted Answer

$$\mathrm{$$FeCl_3$$}$$

Question 12

A molecule of $$\mathrm{NH_3$}$$ has which molecular shape?

Accepted Answer

Trigonal pyramidal

Question 13

Which of the following is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 14

What is the formula weight of $$\mathrm{$$CaCl_2$$}$$? (Atomic weights: Ca = 40.08, Cl = 35.45)

Accepted Answer

$$40.08 + 2 	imes 35.45 = 110.98$$

Question 15

Which of the following is the correct formula for iron(II) sulfide?

Accepted Answer

$$\mathrm{FeS}$$

Question 16

Which of the following statements about ionic compounds is TRUE?

Accepted Answer

They are formed by the transfer of electrons from a metal to a nonmetal.

Question 17

What is the correct name for $$\mathrm{Cu_2O}$$?

Accepted Answer

Copper(I) oxide

Question 18

Which of the following best describes the polarity of $$\mathrm{CH_4$}$$?

Accepted Answer

Nonpolar molecule

Question 19

Which of the following is the correct formula for calcium nitrate?

Accepted Answer

$$\mathrm{Ca(NO_3$)_2}$$

Question 20

A patient is given a medication containing $$\mathrm{NH_4Cl}. $$What is the name of this compound?

Accepted Answer

Ammonium chloride

Chap 4 Forces Between Particles: Ions, Ionic Compounds, and Covalent Bonding

스터디 가이드 - 연습 문제