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WorksheetsCelebration
Total questions: 15
Worksheet time: 10mins
Name
Class
Date
1.
How many neutrons would Fe-56 have?
a)
56
b)
26
c)
30
d)
33
2.
If an atom of oxygen has a charge of -2, how many electrons does the atom have?
a)
18
b)
6
c)
8
d)
10
3.
How many neutrons does the isotope below have? 89 36Kr
a)
53
b)
36
c)
89
d)
125
4.
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
5.
How many neutrons are in the isotope pictured above?
a)
29
b)
34
c)
63
d)
92
6.
How many protons does Titanium- 50 have?
a)
22
b)
48
c)
50
d)
26
7.
How many neutrons does Nitrogen-21 have?
a)
21
b)
7
c)
14
d)
28
8.
What is the difference between Barium-139 and Barium-145?
a)
6 protons
b)
6 neutrons
c)
7 protons
d)
7 neutrons
9.
What is the mass number of Tin-127?
a)
50
b)
119
c)
127
d)
77
10.
Which statement best describes these samples?
a)
The chemical properties are different for each element.
b)
The atomic number is different for each element.
c)
They are isotopes of the same element.
d)
They are allotropes of the same element.
11.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
12.
the central region of an atom where its neutrons and protons are is its
a)
nucleus
b)
electron cloud
c)
core
d)
center
13.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
14.
Most of the mass of an atom is found in the ______.
a)
nucleus
b)
proton
c)
electron cloud
d)
isotope
15.
These are the SMALLEST subatomic particles
a)
Proton
b)
Neutron
c)
Electron
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