chemistry test #3 ch. 10 review

Question 1

the ability of an atom to attract the shared electrons in a covalent bond is its

Answer 1

electronegativity

Question 2

ionic bonding is expected in which of these compounds? OF2, Cl2, H2, HF, KF

Answer 2

square

Question 3

the carbon tetrachloride molecule, has the shape of a

Answer 3

tetrahedron

Question 4

the number of electron lone pairs in the water molecule is

Answer 4

2

Question 5

The shape of the polyatomic ammonium ion, NH4+ is _________.

Answer 5

tetrahedral

Question 6

The HF molecule can be classified as __________.

Answer 6

polar covalent

Question 7

In the Lewis structure of HCN, how many nonbonding electron pairs are present?

Answer 7

1

Question 8

Calculate the total number of electrons in the Lewis structure for the C2H3O2 ion.

Answer 8

24

Question 9

Which molecule is not a polar molecule? CHCl3, HCN, NH3, BCI3

Answer 9

BCI3

Question 10

The molecular geometry of a Cl2CO molecule is ________.

Answer 10

trigonal planar

Question 11

The total number of shared electron pairs in the molecule H2S is ________.

Answer 11

2

Question 12

How many valence electrons are in the nitrate ion?

Answer 12

24

Question 13

which of the following molecules contains a covalent triple bond? HCN, Br2, C2H2Cl2, SO2

Answer 13

HCN

Question 14

the central Xe atom in the XeF4 molecule has ____ unbounded electron pairs and ___ bonded electron pairs in its valence shell

Answer 14

2, 4

Question 15

Determine the electron geometry (eg) and molecular geometry (mg) of CO32 .

Answer 15

eg= trigonal planar, mg= trigonal planar

Question 16

Determine the electron geometry (eg) and molecular geometry (mg) of CO2.

Answer 16

eg= linear, mg= linear

Question 17

What is the angle between electron groups in the trigonal planar electron geometry?

Answer 17

120

Question 18

Which molecule listed below is a polar molecule? HCN, H2O, NH3

Answer 18

all of the compounds

Question 19

Determine the electron geometry (eg) and molecular geometry (mg) of NCl3.

Answer 19

eg= tetrahedral, mg= trigonal pyramidal

Question 20

Determine the electron geometry (eg), molecular geometry (mg), and polarity of SO3.

Answer 20

eg= trigonal planar, mg= trigonal planar, non polar

Question 21

Determine the electron geometry (eg), molecular geometry (mg), and polarity of SO2.

Answer 21

eg= trigonal planar, mg= bent, polar