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WorksheetsAtomic Structure and Theory
Total questions: 23
Worksheet time: 24mins
Name
Class
Date
1.
Isotopes are elements with a different amount of
a)
protons
b)
neutrons
c)
electrons
d)
atoms
2.
Which particle does not contribute mass to the atom?
a)
Proton
b)
Neutron
c)
Electron
d)
Nucleus
3.
an element will always have the same number of
a)
neutrons
b)
protons
c)
isotopes
d)
atoms
4.
An ______________ is the same element, with the same number of protons, but different numbers of neutrons
a)
Atom
b)
Isotope
c)
Atomic Number
d)
Mass Number
5.
The smallest particle into which an element can be divided and still be the same substance
a)
neutron
b)
atom
c)
electron
6.
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
7.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
8.
What is the atomic mass (rounded to the nearest whole number) of this element
a)
196
b)
196.95
c)
197
d)
79
9.
Because atoms are neutral, the number of protons will be equal to the number of __________ in an atom.
a)
Positrons
b)
Neutrons
c)
Electrons
d)
Nuclei
10.
The three main subatomic particles are electrons, protons and ____________.
a)
photons
b)
neurons
c)
neutrons
d)
quarks
11.
What are the two main parts of the atom?
a)
nucleus and cytoplasm
b)
nucleus and electron cloud
c)
core and electron cloud
d)
protons and neutrons
12.
Identify letter A
a)
Nucleus
b)
Neutrons
c)
Protons
d)
Electrons
13.
Identify letter B
a)
Nucleus
b)
Neutrons
c)
Protons
d)
Electrons
14.
Identify letter C
a)
Nucleus
b)
Neutrons
c)
Protons
d)
Electrons
15.
Identify letter D
a)
Nucleus
b)
Neutrons
c)
Protons
d)
Electrons
16.
Subatomic particles with a negative charge
a)
Electrons
b)
Neutrons
c)
Protons
d)
Quarks
17.
Subatomic particles with a positive charge
a)
neutrons
b)
atomic mass
c)
protons
d)
isotopes
18.
Subatomic particles that are neutral in charge
a)
Neutrons
b)
Protons
c)
Nucleus
d)
Electrons
19.
What is the standard unit of mass at the atomic level?
a)
centimeters
b)
millimeters
c)
amu
d)
milligrams
20.
Most of the mass in an atom is made up of _____________________?
a)
protons and electrons
b)
protons and neutrons
c)
neutrons and electrons
d)
electrons and quarks
21.
Give the mass number of an iron atom with 30 neutrons (a)
22.
Give the mass number of an americium atom with 148 neutrons (a)
23.
Give the mass number of each of a tungsten atom with 110 neutrons (a)
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