Worksheets1 Isotopes Quiz
Total questions: 12
Worksheet time: 15mins
Name
Class
Date
1.
What is the mass number for the isotope shown?
a)
29
b)
34
c)
63
d)
92
2.
How many neutrons are in the nucleus of copper-63?
a)
29
b)
34
c)
63
d)
92
3.
Atoms of an element that have a different number of neutrons are called (a) .
4.
How many protons and electrons are in the isotope shown?
a)
16 protons; 17 electrons
b)
18 protons; 36 electrons
c)
17 protons; 16 electrons
d)
17 protons; 18 electrons
5.
How many neutrons in C-14?
a)
6
b)
7
c)
14
d)
8
6.
What quantities vary between isotopes of an element?
a)
protons, electrons, and atomic mass
b)
protons, electrons, and atomic number
c)
neutrons and electrons
d)
neutrons and atomic mass
7.
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?
What is the average mass of this element?
a)
74.92 amu
b)
24.97 amu
c)
75.01 amu
d)
74.51 amu
8.
Calcium has three different isotopes. One has a mass of 35.00 amu; another has a mass of 41.00 amu; and another has a mass of 40.00 amu. Which isotope is the most abundant of the three?
a)
40.00 amu
b)
41.00 amu
c)
35.00 amu
d)
impossible to tell
9.
A neutral atom of the isotope 2612Mg would consist of
a)
12 protons, 26 neutrons, 26 electrons
b)
26 protons, 12 neutrons, 26 electrons
c)
26 protons, 14 neutrons, 14 electrons
d)
12 protons, 14 neutrons, 12 electrons
10.
Magnesium exists as the three isotopes shown. What is the average atomic mass of magnesium?
a)
20.74 amu
b)
22.56 amu
c)
18.39 amu
d)
24.31
11.
An isotope of a certain element (Z) has two common isotopes. Z - 107 and Z - 109. Calculate the average atomic mass if Z- 107 has an abundance of 51.86 %.
a)
106.38649amu
b)
111.91896amu
c)
107.8677amu
d)
121
12.
If X is the symbol for an element, which of the following two symbols represent isotopes of the same element? I. 7735X II. 7733X III. 8137X IV. 8135 X
a)
I and II
b)
III and IV
c)
I and IV
d)
I and III
100 %
