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Unit 4 - Molecular Geometry

Total questions: 29

Worksheet time: 19mins

Name
Class
Date
1.

An ionic bond results from electrostatic (+/-) attraction between large numbers of

a)

cations and anions

b)

atoms

c)

dipoles

d)

orbitals

2.

To draw a Lewis Structure, it is NOT necessary to know

a)

which atoms are in the molecule

b)

bond energies

c)

the number of valence electrons for each atom

d)

the number of atoms in the molecule

3.

Molecules that cannot be represented by a single Lewis Structure are said to have

a)

dipole

b)

covalent

c)

hybrid

d)

resonance

4.

The Lewis Dot Notation for an atom of chlorine is

a)
b)
c)
d)
5.

The Lewis Structure for a molecule of bromine is

a)
b)
c)
d)
6.

An ion of an element differs from an atom of that same element with respect to

a)

mass

b)

number of protons

c)

number of neutrons

d)

number of electrons

7.

What is the ionic charge of the Al in the formula AlBr3?

a)

0

b)

+1

c)

+2

d)

+3

8.

The correct Lewis Structure used to show an ionic combination of potassium and bromine is

a)
b)
c)
d)
9.

A certain atom has 17 protons, 18 neutrons, and 17 electrons. The ion of this atom has an ionic charge of –1. The ion would have

a)

18P 18N 17 e

b)

16P 18N 17e

c)

17P 18N 18e

d)

17P 18N 16e

10.

A bond that involves shared pairs of electrons is called a(n)

a)

ionic bond

b)

covalent bond

c)

metallic bond

d)

intermolecular bond

11.

Which compound would have a total of two single bonds?

a)

HCl

b)

CaCl2

c)

CH4

d)

AlF3

12.

The total number of ELEMENTS in the compound H2SO4 is

a)

1

b)

3

c)

5

d)

7

13.

The total number of ATOMS in one molecule of H2SO4 is

a)

1

b)

3

c)

5

d)

7

14.

Bonds are classified as being ionic or covalent based upon a difference in

a)

ionization energy

b)

electron affinity

c)

electronegativity

d)

hybridization

15.

When an atom loses, gains, or even unequally shares electrons, it gets a(n)

a)

proton

b)

valence shell

c)

oxidation number

d)

group number

16.

A molecule containing two atoms of the same element is said to be:

a)

monotomic

b)

diatomic

17.

Covalent bond that involves two shared pairs of electrons is known as:

a)

double bond

b)

single bond

c)

triple bond

d)

hybrid bond

18.

A chemical bond that results from the attraction between metal ions and the surrounding “sea” of electrons is known as a:

a)

covalent bond

b)

ionic bond

c)

metallic bond

19.

The lowest ratio of ions within an ionic crystal is called a:

a)

formula unit

b)

ionic formula

c)

molecular formula

20.

A pair of electrons on the central atom and not involved in bonding is called:

a)

lone pair

b)

covalent pair

c)

ionic pair

21.

Which of the following is NOT a diatomic molecule?

a)

hydrogen

b)

helium

c)

iodine

d)

chlorine

22.

Which of the following IS a diatomic element?

a)

neon

b)

carbon

c)

nitrogen

d)

phosphorous

23.

Using the table of electronegativity, predict the type of chemical bond for CaS.

a)

ionic bond

b)

nonpolar covalent bond

c)

polar covalent bond

24.

Using the table of electronegativity, predict the type of chemical bond for NH3

a)

ionic bond

b)

polar covalent bond

c)

nonpolar covalent bond

25.

Using the table of electronegativity, predict the type of chemical bond for SrCl2

a)

ionic bond

b)

polar covalent bond

c)

nonpolar covalent bond

26.

Give the ionic charge for the Oxide ion.

a)

16

b)

+2

c)

-2

d)

8

27.

What is the molecular geometry for NH3

a)

tetrahedral

b)

bent

c)

trigonal planar

d)

trigonal pyramidal

e)

linear

28.

What is the molecular geometry for H2O

a)

tetrahedral

b)

bent

c)

trigonal planar

d)

trigonal pyramidal

e)

linear

29.

What is the molecular geometry for CBr4

a)

tetrahedral

b)

bent

c)

trigonal planar

d)

trigonal pyramidal

e)

linear