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3 Weeks Chem Review

Total questions: 25

Worksheet time: 36mins

Name
Class
Date
1.

Atoms are made up of what?

a)

molecules

b)

compounds

c)

elements

d)

subatomic particles

2.

Which subatomic particle as no charge, also known as a neutral charge?

a)

proton

b)

neutron

c)

electron

d)

chakra

3.

A neutron has a neutral charge and a mass of ____ amu.

a)

0

b)

1

c)

.5

d)

2

4.

A electron has a negative charge and a mass of ____ amu.

a)

0

b)

1

c)

2

d)

.5

5.

An proton has a negative charge and a mass of ___ amu.

a)

0

b)

1

c)

.5

d)

2

6.
The atomic mass on the periodic table is an average of all the ____ of an element based on abundance.
a)
protons
b)
isotopes
c)
ions
d)
charges
7.
The number of protons in an element can be found by:
a)
looking up the group the element is in.
b)
subtracting the atomic mass from atomic number
c)
looking up the atomic mass
d)
looking up the atomic number
8.
Which particles are in the nucleus?
a)
Protons
b)
Neutrons
c)
protons and electrons
d)
protons and neutrons
9.

Cations (like Ca2+)gain a positive charge by ____ electrons accoring to the octet rule.

a)

gaining

b)

losing

10.
Anions (like Cl-) gain a negative charge by ____ electrons according to the octet rule.
a)
gaining
b)
losing
11.
What is always different about 2 isotopes of the same element?
a)
Their number of protons
b)
Their number of electrons
c)
Their number of Neutrons
d)
Their reactivity
12.
What does the 6 represent above the C
a)
Symbol 
b)
Name 
c)
Mass Number 
d)
Atomic Number 
13.
How many electrons are in Manganese (Mn) ?
a)
12
b)
25
c)
55
d)
30
14.
How many electrons are in Bromine (Br) ?
a)
35
b)
80
c)
5
d)
11
15.
Which element has 31 protons ?
a)
Gallium 
b)
Germanium
c)
Gadolinium
d)
Polonium
16.
all matter is made of what 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
17.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
18.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
19.

How many neutron are in the atom "K"?

a)

7

b)

2

c)

39

d)

20

20.
How many electrons does a Copper atom have?
a)
63
b)
29
c)
92
d)
34
21.
What is the atomic number for an element with 41 neutrons and a mass number of 80?
a)
39
b)
41
c)
80
d)
121
22.
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
a)
74.92 amu
b)
24.97 amu
c)
75.01 amu
d)
74.51 amu
23.
An element has three different isotopes. One has a mass of 35.00 amu; another has a mass of 36.00  amu; and another has a mass of 38.00  amu. What is the average atomic mass of this element?
a)
36.33 amu
b)
37.00 amu
c)
12.11 amu
d)
impossible to tell
24.

An element with 4.35% have a mass of 49.9461 amu, 83.79% have amass of 51.9405 amu, 9.50% have a mass of 52.9407 amu, and 2.36% have a mass of 53.9389amu. What is the average atomic mass?

a)

51.99 amu

b)

52.19 amu

c)

53.45 amu

d)

17.33 amu

25.

An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?

a)

9.012, Beryllium

b)

12.011, Carbon

c)

6.941, Lithium

d)

10.812, Boron

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