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3rd 4.5 BM Review 1

Total questions: 30

Worksheet time: 52mins

Name
Class
Date
1.

What is NaCl?

a)

An Element

b)

A Compound

c)

A Homogeneous Mixture

d)

A Heterogeneous Mixture

2.

Which of the following is a mixture?

a)

soda

b)

rust (Fe2O3)

c)

methane (CH4)

d)

oxygen (O2)

3.
This picture represents: 
a)
Element
b)
Compound
c)
Mixture of Elements
d)
Mixture of Compounds
4.

Because Oxygen (O) can combine with other substances but cannot be changed into a simpler substance by an ordinary chemical process, oxygen is classified as ___.

a)

an element

b)

an acid

c)

a mixture

d)

a compound

5.
You unfold a paperclip without the metal breaking. This demonstrates which property for metals?
a)
Malleability
b)
Luster
c)
Melting point
d)
Density
6.

What happens to a solid object with a density that is less than water when it is placed in water?

a)

The object sinks about halfway into the water.

b)

The object displaces a quantity of water greater than its volume.

c)

The object settles to the bottom of the water.

d)

The object floats on top of the water.

7.

Which is a chemical property of matter?

a)

Reactivity

b)

Color

c)

Density

d)

Solubility

8.

What is the name of the tendency of a substance to undergo a chemical reaction?

a)

reactivity

b)

combustibility

c)

malleability

d)

solubility

9.

An unknown substance feels slippery, tastes bitter, and has a pH of 8.5. This substance is ___.

a)

a base

b)

an acid

c)

a salt

d)

a neutral substance

10.

John Dalton stated:

a)

Atoms are tiny, invisible particles.

b)

Atoms of one element are all the same.

c)

Atoms of different elements are different.

d)

Compounds form by combining atoms.

e)

All of the statements listed.

11.
Which scientist saw the atom as a positively charged sphere with negative particles (electrons) embedded within?
a)
J.J. Thomson
b)
Niels Bohr
c)
John Dalton
d)
Ernest Rutherford
12.

According to atomic theory, electrons are usually found ___.

a)

either inside or outside the nucleus

b)

outside the nucleus, but very close to it

c)

inside the nucleus

d)

outside the nucleus and often far away from it

13.

10.811 describes the ___ of Boron.

a)

atomic mass

b)

atomic number

c)

number of protons

d)

number of neutrons

14.

Which statement is true about all nonmetals EXCEPT for hydrogen?

a)

They are all liquids at room temperature.

b)

They are all found to the right of the zig-zag line on the Periodic Table.

c)

They are all very reactive.

d)

They are all found in nature in their pure (unbonded) form.

15.

Students conducted an investigation on the properties of three elements. What type of element should lithium be labeled?

a)

Nonmetal

b)

Metal

c)

Metalloid

d)

Undermetal

16.

Boron (B) is a ___.

a)

nonmetal

b)

metalloid

c)

metal

d)

mixture

17.
An atom of a group 2 element is most likely to form a bond with ___. (Hint: Group 2 has 2 valence)
a)
Sulfur (group 16)
b)
Argon (group 18)
c)
Chlorine (group 17)
d)
Calcium (group 2)
18.
What is the symbol for the ion that has 11 protons and 10 electrons?
a)
Na+
b)
Ne+
c)
Ne-
d)
Na-
19.
Which group of elements have the most reactive metals?
a)
metalloids
b)
halogens
c)
alkali metals
d)
noble gases
20.
When two atoms share electrons (at least one from each atom), what is this occurrence called?
a)
hybridization
b)
ionic bonding
c)
covalent bonding
d)
ionization
21.

Which of the following is the most stable?

a)

Argon (Ar)

b)

Calcium (Ca)

c)

Potassium (K)

d)

Oxygen (O)

22.

Which of the following has 7 valence electrons?

a)

Phosphorous (P)

b)

Oxygen (O)

c)

Fluorine (F)

d)

Neon (Ne)

23.
What is NOT a physical change?
a)
Burning a candle
b)
Bending a paper clip
c)
Chopping onions
d)
Ice cubes melting
24.
What is an example of a physical change?
a)
Boiling water
b)
Rusting of iron
c)
Adding bleach to a washer of clothes
d)
Eating foods
25.
What is an example of an endothermic reaction?
a)
Grilling a hamburger
b)
Exploding fireworks
c)
Burning wood
d)
Smoldering coals
26.
What might be a concern raised by community members if they were told that a nuclear power plant was going to be built in their neighborhood?
a)
the threat of a nuclear accident or spill
b)
the air pollution generated by the plant
c)
coal could be used to produce more energy per gram of fuel
d)
excessive use of petroleum would leak into the water under the ground
27.
Which process is used by nuclear power plants to produce energy?
a)
Nuclear fission
b)
Nuclear fusion
c)
Nuclear isotope
d)
Nuclear meltdown
28.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
29.
Law of conservation of matter states that ____.
a)
Matter can be created
b)
Matter can be destroyed
c)
Matter can neither be created nor destroyed
d)
Matter does not change
30.
How many Oxygen atoms are in 4H2O?
a)
4
b)
1
c)
0
d)
8

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