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WorksheetsChem Unit 2 Review
Total questions: 26
Worksheet time: 43mins
Name
Class
Date
1.
Found in the nucleus of the atom
a)
electrons only
b)
protons only
c)
neutrons and protons
d)
neutrons and electrons
2.
What is the atomic mass of Neon from the Periodic Table?
a)
10
b)
20.18
c)
10.18
d)
30.18
3.
How many neutrons does a Hydrogen atom from the Periodic Table have?
a)
1
b)
2
c)
3
d)
0
4.
How many electrons does a Copper atom from the Periodic Table have?
a)
63
b)
29
c)
92
d)
34
5.
In the isotope name, Hydrogen-3, what does the 3 represent?
a)
charge
b)
mass number
c)
atomic number
d)
number of electrons
6.
Ernest Rutherford discovered which part of the atom through the use of gold foil experiment?
a)
electron cloud
b)
Neutron
c)
Electron
d)
positive nucleus
7.
Which scientist first discovered the atom and was the founder of the billiard ball model?
a)
John Dalton
b)
Niels Bohr
c)
Erwin Schrodinger
d)
JJ Thomson
8.
Which chemist was credited with discovering the electron?
a)
John Dalton
b)
Niels Bohr
c)
JJ Thomson
d)
Ernest Rutherford
9.
Changing which particle only changes the charge of an element?
a)
proton
b)
electron
c)
neutron
d)
positron
10.
Changing which particle only changes the atomic mass of an element?
a)
proton
b)
electron
c)
neutron
d)
positron
11.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
12.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
13.
A heterogeneous mixture in which some of the particles settle to the bottom of a mixture
a)
solution
b)
colloid
c)
solvent
d)
suspension
14.
Milk is an example of a
a)
solution
b)
suspension
c)
colloid
d)
combination
15.
Which of the following is not a clue that a chemical change has occurred?
a)
The solution begins to bubble
b)
A change in the state of matter
c)
The solution begins to change color
d)
The substance begins to produce a potent odor
16.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
17.
How many p, e, and n does Hydrogen have?
a)
1 p 1 e 1 n
b)
1 p 1 e 0 n
c)
1 p 1 e 2 n
d)
2 p 2 e 2 n
18.
How many p, e, and n does Iron have?
a)
26 p 26 e 26 n
b)
53 p 53 e 74 n
c)
26 p 26 e 30 n
d)
53 p 53 e 53 n
19.
How many p, e, and n does O+2 have?
a)
16 p 16 e 16 n
b)
8 p 8 e 8 n
c)
8 p 8 e 6 n
d)
8 p 6 e 8 n
20.
How many p, e, and n does Nitrogen-16 have?
a)
14 p 14 e 14 n
b)
7 p 7 e 7 n
c)
7 p 9 e 7 n
d)
7 p 7 e 9 n
21.
An ion refers to
a)
Only changing the number of protons
b)
Only changing the number of neutrons
c)
An element that has a charge by only changing the number of electrons
d)
Changing the number of protons or electrons
22.
An isotope refers to
a)
Only changing the number of protons
b)
An element that has a new mass by only changing the number of neutrons
c)
Only changing the number of electrons
d)
Changing the number of protons or neutrons
23.
What particle determines what the element is?
a)
proton
b)
electron
c)
neutron
d)
positron
24.
Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?
a)
Nitrogen-13
b)
Nitrogen-14
c)
Nitrogen-15
d)
Based on the information given, it cannot be determined
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
26.
Gallium occurs in nature as a mixture of two isotopes. Gallium-69 is 61% abundant while Gallium-71 is 39% abundant. Calculate the average atomic mass of Gallium.
a)
69.78 amu
b)
6,978 amu
c)
69.5 amu
d)
0.68 amu
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