WorksheetsAtomic Structure Basics
Total questions: 27
Worksheet time: 30mins
Name
Class
Date
1.
What two sub-atomic particles are inside the nucleus of the atom?
a)
Protons and Electrons
b)
Electrons and Neutrons
c)
Protons and Nucleus
d)
Protons and Neutrons
2.
Which sub-atomic particle is the smallest?
a)
Electron
b)
Neutron
c)
Proton
d)
Nucleus
3.
What charge is an proton?
a)
Positive
b)
Negative
c)
Neutral
d)
Positive or Negative
4.
What is the neutron?
a)
A negatively charged particle outside the nucleus
b)
A positively charged particle inside the nucleus
c)
A particle without a charge inside the nucleus
d)
A positively charged particle outside the nucleus
5.
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
6.
An atom has 10 protons, 15 neutrons and 10 electrons what is its mass number.
a)
20
b)
10
c)
5
d)
25
7.
What is the atomic number of the atom pictured?
a)
9
b)
10
c)
18
d)
19
8.
What charge does the nucleus have and why?
a)
positive - the neutrons do not have a charge
b)
positive - the neutrons and protons are positively charged particles
c)
neutral - the neutral charge dominates the positive charge
d)
neutral - electrons cancel out the positive charge of the atom
9.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
10.
What does the ATOMIC MASS tell us about an atom?
a)
Protons + Neutrons
b)
Protons + Electrons
c)
Neutrons + Electrons
11.
The mass number of an element that has 18 protons, 18 electrons, and 19 neutrons is _____.
a)
12.5
b)
13
c)
25
d)
37
12.
The atomic number of an element that has 9 protons, 9 electrons, and 10 neutrons is _____.
a)
9
b)
10
c)
19
d)
28
13.
These subatomic particles are taken or removed to form ions.
a)
neutrons
b)
protons
c)
electrons
d)
nimrons
14.
An atom is said to be neutral if it has the same # of electrons and ________.
a)
thing-ons
b)
electrons
c)
neutrons
d)
protons
15.
How many protons are in an atom with an atomic number of 20, an atomic mass of 45, and a charge of +2?
a)
20
b)
10
c)
2
d)
18
16.
How many electrons are in an ion that has an atomic number of 34, and a charge of -2?
a)
34
b)
36
c)
2
d)
40
17.
How many neutrons will an atom have it has an atomic number of 26, an atomic mass of 58?
a)
26
b)
58
c)
32
d)
3
18.
What is the nuclear charge of a potassium atom?
a)
+18
b)
+19
c)
+39
d)
+1
19.
What is an ion?
a)
A Charged Atom
b)
A Large Atom
c)
A Small Atom
d)
A Cute Atom
20.
An atom becomes _________ when it gains electrons.
a)
Positive
b)
Negative
c)
Neutral
d)
Invinsible
21.
An isotope has three forms. 30% have a mass of 4 amu, 20% have a mass of 5 amu and 50% have a mass of 3 amu. Average atomic mass will be closest to
a)
2 amu
b)
3 amu
c)
4 amu
d)
5 amu
22.
An element has three different isotopes. One has a mass of 35.00 amu; another has a mass of 36.00 amu; and another has a mass of 38.00 amu. What is the average atomic mass of this element?
a)
36.33 amu
b)
37.00 amu
c)
12.11 amu
d)
impossible to tell
23.
Atom 1 has Mass=12 Protons=6
Atom 2 has Mass= 14 Electrons=6
Are these atoms isotopes of each other or different elements?
Atom 2 has Mass= 14 Electrons=6
Are these atoms isotopes of each other or different elements?
a)
Different Elements - Mg & Si
b)
Different Elements - Ar & Ca
c)
Isotopes of Carbon
d)
Isotopes of Magnesium
24.
Which of the following could have 82 neutrons?
a)
W-182
b)
Ta-181
c)
Cs-132
d)
Ba-138
25.
Calculate the average atomic mass of the element iron (Fe) using the following data:
[Isotope / % abundance]
[Iron 54 / 6% ] [Iron 56 / 92% ] [ Iron 57 / 2% ]
a)
53.7 amu
b)
54.9 amu
c)
5592.0 amu
d)
55.9 amu
26.
If an atom contains exactly three protons, then it's an atom of _____
a)
lithium
b)
gold
c)
nitrogen
d)
carbon
27.
Rubidium has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 72.2% and the abundance of 87Rb is 27.8%, what is the average atomic mass of rubidium?
a)
85.468 amu
b)
37 amu
c)
85.6 amu
d)
86.4 amu
100 %
