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WorksheetsCH Chapter 3: History of the Atom
Total questions: 20
Worksheet time: 1hrs 25mins
Name
Class
Date
1.
What is a particle with one negative charge called?
a)
electron
b)
proton
c)
quark
d)
neutron
2.
The smallest particle of an element that still represents that element.
a)
Nucleus
b)
electron
c)
proton
d)
atom
3.
What is a particle with one positive charge called?
a)
proton
b)
electron
c)
neutron
d)
quark
4.
What is the center of an atom called?
a)
nucleus
b)
electron cloud
c)
proton center
d)
photon center
5.
What is the neutral particle found in the nucleus called?
a)
proton
b)
neutron
c)
electron
d)
quark
6.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
7.
How many electrons does Cu4+ have?
a)
29
b)
33
c)
25
d)
30
8.
How many electrons does S2- have?
a)
16
b)
18
c)
14
d)
12
9.
Elements can have the same number of protons?
a)
True
b)
False
10.
When an atom loses a valence electron, it becomes a(n) _____________ ion.
a)
positive
b)
negative
c)
neutral
d)
polyatomic
11.
How many valence electrons in this structure?
a)
6
b)
5
c)
4
d)
7
12.
Which subatomic particles contribute the most to the mass of an atom?
a)
Protons, Neutrons, Electrons
b)
Protons only
c)
Protons and Electrons
d)
Protons and Neutrons
13.
The number of protons is equal to
a)
the atomic number
b)
the number of neutrons
c)
the energy levels
d)
the periodic table groups
14.
If an atom has 12 neutrons and 11 protons, what is its atomic mass?
(a)
15.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
16.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
17.
In a correctly written symbol what would be located in the "A" position?
a)
number of neutrons
b)
atomic number
c)
number of electrons
d)
mass number
18.
which atom has 4 neutrons?
a)
Li-6
b)
Li-7
c)
Li-8
d)
they have the same # of neutrons
19.
Isotopes are atoms of the same element with different #’s of __________ & therefore different __________.
a)
n0 ; atomic #’s
b)
p+ ; atomic #’s
c)
e- ; atomic masses
d)
n0 ; atomic masses
20.
How many electrons are in an atom that has an atomic number of 34, an atomic mass of 74 and a charge of -2?
a)
34
b)
36
c)
2
d)
40
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