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Week 3 Review: Compounds, bonding, water, and pH

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.
Contains only one kind of atom.
a)
Element
b)
Compund
c)
Mixture
2.
Contains two or more atoms combined
a)
Elements
b)
Compounds
c)
Mixtures
3.
Is sugar (C12H22O11) an element or a compound?
a)
Element
b)
Compound
4.
Which of the following is not a compound?
a)
HCl
b)
Cl
c)
NaCl
d)
CO2
5.
How do covalent bonds form?
a)
Donating & receiving valence e- between atoms.
b)
Opposite slight charges attract each other between compounds.
c)
Scientists are still not sure how they form.
d)
Sharing valence e- between atoms.
6.

Ionic Bonding is the _________ of electron/s between atoms.

a)

sharing

b)

transfer

c)

loose

d)

gain

7.

Which particle is responsible for bonding?

a)

Electrons

b)

Protons

c)

Nucleus

d)

Neutrons

8.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
helium and carbon
d)
oxygen and carbon
9.
What word describes when water is attracted to other substances?
a)
cohesion
b)
adhesion
c)
capillary action
d)
surface tension
10.

Why does water move from the roots to the leaves of plants?

a)

Water is pushed by solutes

b)

Capillary action pulls the water molecules up like a chain

c)

Water is pulled by gravity

d)

Water cannot move up roots to leaves

11.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
12.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
13.

Which term refers to water having a slightly positive and a slighty negative charge on its ends?

a)

cohesion

b)

surface tension

c)

polar

d)

adhesion

14.

A paperclip floating on water is an example of what property of water?

a)

capillary action

b)

surface tension

c)

universal solvent

d)

specific heat index

15.

The table shows the pH of several solutions. Which solution is the most acidic?

a)

vinegar

b)

milk

c)

water

d)

bleach

16.

A sugar solution has a pH of 7. This means the sugar solution is:

a)

acidic

b)

basic

c)

neutral

17.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-5
d)
1-20
18.
Complete the sentence.
A substance that is more basic has a _____ pH than a substance that is acidic.
a)
lower
b)
higher
c)
the same
d)
none of the above
19.

Water has a neutral because

a)

it has more H+ ions than OH-

b)

it has more OH- ions than H+

c)

it does not produce any ions

d)

it has an equal amount of H+ and OH- in solution

20.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk