Forces between Particles

Question 1

Which of the following would cause a calcium atom (Ca) to achieve a noble-gas configuration?

Select one:

a. lone one electron
b. lose two electrons
c. gaine one electron
d. gain two electrons

Answer 1

b. lose two electrons

Question 2

The rigid three-dimensional arrangement assumed by the ions of ionic compounds is called

Select one:

a. a molecule.
b. a binary compound.
c. a lattice site.
d. a crystal lattice.

Answer 2

d. a crystal lattice.

Question 3

A covalent bond results when

Select one:

a. one atom gives up an electron to another atom.
b. one atom gives up two electrons to another atom.
c. two atoms share a pair of electrons.
d. two atoms share a single electron.

Answer 3

c. two atoms share a pair of electrons.

Question 4

In describing the strength of interparticle forces we discover that the weakest forces of bonds are

Select one:

a. covalent.
b. metallic.
c. dipolar.
d. dispersion.

Answer 4

d. dispersion.

Question 5

Which types of interparticle forces lead to compounds with the lowest melting points?

Select one:

a. covalent
b. dispersion forces
c. ionic
d. dipolar forces

Answer 5

b. dispersion forces

Question 6

Which of the following has a noble gas electronic configuration?

Select one:

a. Cl
b. O-
c. Br_
d. Cl+

Answer 6

c. Br_

Question 7

When magnesium forms an ion, it would be represented as _______.

Select one:

a. Mg-
b. Mg2
c. Mg+
d. Mg2+

Answer 7

d. Mg2+

Question 8

The correct name for CeS is ______.

Select one:

a. cesium sulfate
b. cesium sulfide
c. cerium sulfate
d. cerium sulfide

Answer 8

d. cerium sulfide

Question 9

When an ionic compound forms between sodium (Na) and bromine (Br) atoms, it is true that

Select one:

a. a bromine atom donates an electron to a sodium atom.
b. both the bromine atoms and sodium atoms donate electrons to each other.
c. a sodium atom donates an electron to a bromine atom.
d. neither bromine nor sodium atoms donate electrons to each other.

Answer 9

c. a sodium atom donates an electron to a bromine atom.

Question 10

Which of the following has the highest electronegativity?

Select one:

a. O
b. N
c. Si
d. P

Answer 10

a. O

Question 11

Which of the following would be a polar molecule?

Select one:

a. O2
b. HCl
c. CH4
d. F2

Answer 11

b. HCl

Question 12

The shape of a BF3 molecule is

Select one:

a. angular.
b. trigonal planar.
c. trigonal pyramid.
d. tetrahedral.

Answer 12

b. trigonal planar.

Question 13

Which of the following is considered to have an ionic bond?

Select one:

a. NO
b. AIN
c. ClF
d. KCl

Answer 13

d. KCl

Question 14

Which pair of elements will be further apart in electronegativity?

Select one:

a. Cl and F
b. Li and Cl
c. Mn and Se
d. U and Cs

Answer 14

b. Li and Cl

Question 15

Which of the following distinguishing electron configuration is characteristic of noble gas?

Select one:

a. f14
b. d10
c. P6
d. s2

Answer 15

c. P6

Question 16

Which of the following has a noble-gas electronic configuration?

Select one:

a. Cl
b. O-
c. Br-
d. Cl+

Answer 16

c. Br-

Question 17

Arrange the following bonds in order of increasing bond polarity.

Select one:

a. C–O < P–O < Cl–O
b. Cl–O < C–O < P–O
c. P-O < Cl-O < C-O
d. C–O < Cl–O < P–O

Answer 17

b. Cl–O < C–O < P–O

Question 18

Which of the following molecules would be classified as polar covalent?

Select one:

a. NaCl
b. CH3Cl
c. KCl
d. CaCl2

Answer 18

b. CH3Cl

Question 19

The ionic compound that forms between magnesium (Mg) and oxygen (O) has the formula

Select one:

a. Mg2O
b. MgO
c. MgO2
d. MG2O3

Answer 19

b. MgO

Question 20

How many moles of K+ and P3- ions are present in 2.00 moles of K3P?

Select one:

a. 6.00 mol K+ and 2.00 mol P3-
b. 3.00 mol K+ and 1.00 mol P3-
c. 1.00 mol K+ and 3.00 mol P3-
d. 2.00 mol K+ and 6.00 mol P3-

Answer 20

a. 6.00 mol K+ and 2.00 mol P3-

Question 21

The best name for the covalent compound N2O4 is

Select one:

a. dinitrogen tetroxide.
b. nitrogen oxide.
c. nitrogen quartoxide.
d. dinitrogen quartoxide.

Answer 21

a. dinitrogen tetroxide.

Question 22

The correct formula for the ionic compound containing Al+3 and PO43- would be

Select one:

a. Al3 (PO4)3
b. AlPO4
c. Al3(PO4)2
d. Al2(PO4)3

Answer 22

b. AlPO4

Question 23

The correct formula of an ionic compound containing Fe 2+ and PO43-

Select one:

a. FePO4
b. Fe2(PO4)3
c. Fe (PO4)2
d. Fe3 (PO4)2

Answer 23

d. Fe3 (PO4)2