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CQA Chemistry Review
Test Description: Review for Chemistry Quarter Final
Instructions: Answer all questions to get your test result.
1) In an atom the electron is located
A
in the nucleus
B
with the protons
C
with the neutrons
D
in energy levels around the nucleus
2) The atomic NUMBER equals
A
the number of electrons in the nucleus
B
the number of protons in the nucleus
C
the number of neutrons in the nucleus
3) Using a Periodic Table what element has 36 electrons?
A
krypton
B
chlorine
C
iodine
D
fluorine
4) A Neutron has
A
a negative charge
B
a positive charge
C
no charge
5) How is NaCl different from Na and Cl?
A
They have different properties.
B
They have different weights.
C
They have different masses.
D
Nothing. They are exactly the same.
6) Students mixed aluminum and copper chloride. How do we know a chemical reaction occurred?
A
Bubbles of gas formed.
B
The total mass increased.
C
Nothing happened.
D
The total mass was reduced.
7) Most elements are in what state at room temperature?
A
liquid
B
solid
C
gas
8) Based on its place on the Periodic Table, which element is most like Neon (Ne)?
A
Helium (He)
B
Uranium (U)
C
Oxygen (O)
D
Lithium (Li)
9) Jesse is drawing a model of a Carbon atom. What will she put in the center?
A
6 electrons
B
6 protons
C
6 neutrons
10) An element has a gray metal color, but has properties of both metals and nonmetals. Where on the Periodic Table will it be found?
A
on the stairstep
B
to the left
C
in Group 1
D
to the right
11) The name for group 18 is
A
Transition Metals
B
Alkali Metals
C
Lanthanoids
D
Nobel Gases
12) Periods are
A
rows
B
groups
C
columns
13) All elements in a family share common
A
symbols
B
atomic numbers
C
properties
D
masses
14) If the mass of the products is GREATER than the reactants, what likely happened?
A
The law of conservation of mass is NOT true.
B
Someone measured wrong!
C
The world is coming to an end.
D
The chemical reaction created new atoms.
15) If you combine 4g of phosphorus with 5 g of oxygen how much phosphorus oxide will you get?
A
20 g
B
1 g
C
0.8 g
D
9g
16) Students mixed copper chloride and sodium hydrogen sulfate. How do we know a chemical reaction occurred?
A
It changed color and became cold.
B
New atoms were created.
C
New atoms were created.
17) Water has the formula H2O. What can be concluded about its structure?
A
It is a molecule made of three elements.
B
It is a molecule made of two elements.
C
It is an atom made of three elements
D
It is an atom made of two elements.
18) We don't eat or drink during lab because some chemicals are
A
toxic
B
biohazardous
C
flammable
D
safe
19) Anything that is sold for use at home can be poured down the drain or thrown away.
A
true
B
false
*select an answer for all questions
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