Chemistry Term 1 Review Worksheet With Answers
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17Chem term # 1 review sheet
Name:
Date:
1.
An isotope of which element has an atomic number of 6 and a
6.
Which atoms represent di erent isotopes of the same element?
mass number of 14?
39
39
58
59
A.
Ar and
K
B.
Co and
Ni
18
19
27
28
A. carbon
B.
magnesium
12
13
35
35
C.
C and
C
D.
Cl and
Cl
6
6
17
17
C.
nitrogen
D. silicon
7.
Which is the symbol for the deutrium isotope of hydrogen?
2.
Isotopes of the same element must have the same
1
2
3
4
A.
H
B.
H
C.
H
D.
H
1
1
1
2
A. atomic number
B.
mass number
C.
number of nucleons
D. number of neutrons
8.
Atoms of every isotope of calcium have the same
A. atomic mass
B.
atomic number
10p
3.
Which of the following nuclei is an isotope of
11n ?
C.
number of neutrons
D. number of nucleons
11p
10p
A.
9n *YT*
B.
10n *YT*
9p
11p
C.
11n *YT*
D.
12n *YT*
9.
Which pair most represents isotopes of the same element?
120
120
38
39
A.
X and
X
B.
X and
X
51
52
18
18
C.
X
2+
and
X
2+
D.
X
2+
and
X
3+
21
19
26
26
4.
If X is the symbol of an element, which pair correctly represents
isotopes of X?
158
158
64
158
A.
X and
X
B.
X and
X
64
64
158
64
10.
A neutral atom with 6 electrons and 8 neutrons is an isotope of
158
159
158
158
C.
X and
X
D.
X and
X
64
64
64
65
A. carbon
B.
silicon
C.
nitrogen
D. oxygen
5.
Di erent isotopes of the same element must have a di erent
11.
All isotopes of which element in Group 16 (VIA) are naturally
radioactive?
A. mass number
B.
atomic number
C.
number of protons
D. number of electrons
A. S
B.
Se
C.
Po
D. Te
page 1
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