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8th_Topic 1_Lesson 4

Total questions: 29

Worksheet time: 41mins

Name
Class
Date
1.
What elements generally make an ionic bond?
a)
metal and nonmetal
b)
2 or more nonmetals
c)
metal
d)
none of the above
2.
In chemical compounds, covalent bonds form when
a)
the electronegativity difference between two atoms is very large.
b)
electrons are completely transferred between two metals.
c)
pairs of electrons are shared between two nonmetal atoms.
d)
two nonmetal atoms are attracted to each other by opposite charges.
3.
An ionic bond forms when 
a)
Valence electrons are shared
b)
a sea of mobile electrons surround the cations
c)
valence electrons are transferred between atoms
d)
none of the above
4.
What is a valence electron?
a)
an electron that is found in the outermost shell of an atom. 
b)
an electron found in the innermost shell of an atom.
c)
an electron found in the middle shell.
5.

What is the number of valence electrons of Oxygen?

a)

1

b)

2

c)

6

d)

8

6.

How many electrons are being shared between the two carbon atoms in the compound ethyne?

a)

1

b)

2

c)

3

d)

6

7.

Predict the bond that will form between Se and Cl

a)

Ionic-bond

b)

Covalent-bond

c)

Metallic-bond

d)

Hydrogen-bond

8.

A molecule that has a partial positive end and a partial negative end because of unequal sharing of electrons is a _______________.

a)

nonpolar molecule

b)

polar molecule

c)

ionic compound

d)

metalic compound

9.

The boiling point of polar molecules is __________ the boiling point of nonpolar molecules.

a)

lower than

b)

equal to

c)

higher than

10.

What type of bonding does this picture show?

a)

Ionic

b)

Covalent

11.

What type of bonding does this picture show?

a)

Ionic

b)

Covalent

12.

Generally, atoms form bonds so that _______________.

a)

Each atom loses its electrons

b)

Each atom has a stable electron configuration

c)

Each atom has an unstable electron configuration

d)

Each atom gains electrons

13.

Generally low melting and boiling points

a)

Ionic compounds

b)

Covalent compounds

14.

Conducts electricity well when melted or dissolved

a)

Ionic compounds

b)

Covalent compounds

15.

MgO

a)

ionic

b)

covalent

c)

metallic

16.

Identify the charge for Chlorine (Cl) when it forms an ion

a)

1-

b)

1+

c)

2-

d)

2+

e)

3-

17.

Identify the charge for Oxygen (O).

a)

1+

b)

2+

c)

2-

d)

3-

e)

3+

18.

Identify the charge for Potassium (K).

a)

1-

b)

1+

c)

2+

d)

2-

19.

If an atom has no charge, which of the following must be true?

a)

It has more neutrons than protons or electrons.

b)

There are only neutrons inside the atom.

c)

Its number of protons is equal to its number of electrons.

d)

The neutrons in the atom outnumber the electrons and protons.

20.

Predict the type of bond between helium and fluorine.

a)

ionic

b)

covalent

c)

metallic

d)

no bond

21.

Zinc fluoride

a)

ZnF2

b)

Zn2F

c)

ZnF

d)

Zn2F4

22.
Is this ionic bond drawn correctly?
a)
Yes
b)
No
23.
Is hydrogen considered a metal or a non-metal?
a)
A metal
b)
Nonmetal
c)
Metalloid
24.

Sodium and Bromine will make a _____ bond

a)

Ionic

b)

Hydrogen

c)

Covalent

d)

Exploding

25.

Classify the following molecule.

a)

polar

b)

nonpolar

26.

Which of the following formulas represents a polar molecule?

a)

H2

b)

NI3

c)

CO2

d)

CCl4

27.
Which formula represents a nonpolar molecule?
a)
HBr
b)
H2S
c)
CBr4
d)
PCl3
28.

Classify the following as polar or nonpolar: SF2

a)

polar

b)

nonpolar

29.

Classify the following as polar or nonpolar: SiO2

a)

polar

b)

nonpolar

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