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WorksheetsAtomic Structure and Periodic Table
Total questions: 65
Worksheet time: 1hrs 5mins
Name
Class
Date
1.
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
2.
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
3.
What particle provided the positive charge for an atom?
a)
proton
b)
neutron
c)
electron
d)
nucleus
4.
Which particle only contributes to the mass of an atom?
a)
Proton
b)
Neutron
c)
Electron
d)
Nucleus
5.
Which particle does not contribute mass to the atom?
a)
Proton
b)
Neutron
c)
Electron
d)
Nucleus
6.
Which particle contributes the negative charge to the atom?
a)
proton
b)
electron
c)
neutron
d)
nucleus
7.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
8.
What scientist is best known for his "Plum Pudding" model of the atom?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
9.
What scientist is best known for his gold foil experiment?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
10.
Who is the first scientist to think that the atom was the smallest unit of matter?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
11.
All elements are composed of
a)
molecules
b)
atoms
c)
neutrons
d)
compounds
12.
____________ can move from one energy level to another when they gain or lose energy.
a)
electrons
b)
protons
c)
neutrons
d)
atoms
13.
Atoms of the same element must always have the same number of _________
a)
electrons
b)
neutrons
c)
isotopes
d)
protons
14.
The dense, positively charged mass located in the center of the atom.
a)
nucleus
b)
proton
c)
isotope
d)
molecule
15.
The _________ of an element equals the number of protons in an atom of that element
a)
mass number
b)
atomic weight
c)
atomic number
d)
isotopes
16.
The __________ of an atom is the sum of the protons and neutrons in the nucleus of that atom.
a)
mass number
b)
atomic number
c)
atomic weuight
d)
isotope weight
17.
Two atoms of the same element but with different mass numbers are called________
a)
electrons
b)
isotopes
c)
variables
d)
electron cloud
18.
Isotopes are elements with a different amount of
a)
protons
b)
neutrons
c)
electrons
d)
atoms
19.
region of space where an electron is likely to be found.
a)
atomic number
b)
nucleus
c)
orbital
d)
electron zone
20.
an element will always have the same number of
a)
neutrons
b)
protons
c)
isotopes
d)
atoms
21.
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
22.
What is the standard unit of mass at the atomic level?
a)
centimeters
b)
millimeters
c)
amu
d)
milligrams
23.
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
24.
A proton has approximately the same mass as a(n) _______________.
a)
straight pin
b)
quark
c)
electron
d)
neutron
25.
What is the electrical charge of a proton?
a)
1+
b)
1-
c)
neutral
d)
2-
26.
Rutherford's gold foil experiment provided evidence that...
a)
negative and positive charges are spread evenly throughout the atom.
b)
alpha particles have a positive charge.
c)
gold is not a dense as previously thought.
d)
there is a dense positively charged nucleus at the center of an atom.
27.
Which statement about subatomic particles is true?
a)
Protons, neutrons, and electrons all have about the same mass.
b)
Unlike protons or neutrons, electrons have no mass.
c)
Neutrons have no charge and no mass.
d)
An electron has far less mass than either a proton or neutron.
28.
Which statement is true about oxygen-17 and oxygen-18?
a)
They do not have the same number of protons.
b)
Their atoms have an identical mass.
c)
They are isotopes of oxygen.
d)
The have the same mass number.
29.
An atom with an unequal number of protons and electrons is said to have (a) ___.
a)
no charge
b)
balance
c)
charge
d)
unbalance
30.
Components of atoms
a)
quarks
b)
isotpoes
c)
subatomic particles
d)
ions
31.
Hydrogen has 1 proton. It's atomic number is:
a)
0
b)
1
c)
2
d)
cannot be determined
32.
An atom has 10 protons and a mass of 18. It has __ neutrons
a)
10
b)
18
c)
28
d)
8
33.
The charge on an ion is
a)
always positive.
b)
always negative.
c)
either positive or negative.
d)
zero.
34.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
35.
A ___________ is an arrangement of elements in columns
a)
columns
b)
rows
c)
periodic table
d)
electron shell
36.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
37.
Each row in the periodic table is called a
a)
group
b)
period
c)
cluster
d)
unit
38.
Each column in the periodic table is called a
a)
period
b)
group
c)
cluster
d)
unit
39.
The family in the periodic table that contains the most reactive metals is the_______
a)
Alkaline Earth Metals
b)
Transition Metals
c)
Alkali Metals
d)
Other Metals
40.
Which group of the periodic table is composed of inert (not reactive) gases?
a)
alkali metals
b)
alkaline earth metals
c)
halogens
d)
noble gases
41.
The atomic number of this pictured element is
a)
28
b)
58.6934
c)
Ni
d)
Nickel
42.
Generally, as you move from left to right across the periodic table, elements become
a)
less stable.
b)
more stable.
43.
A(n) _______ electron is _______ the nucleus.
a)
spinning, closest to
b)
valence, attached to
c)
valence, farthest from
d)
negative, inside
44.
How many electrons do atoms need to be stable?
a)
1
b)
2
c)
6
d)
8
45.
Calcium is most like which of the following?
a)
Barium
b)
Potassium
c)
Cesium
d)
Nitrogen
46.
Neon is which of the following?
a)
Alkali metal
b)
Alkali earth metal
c)
Nobel gas
d)
Halogen
47.
The alkali metals have how many valence electrons?
a)
1
b)
2
c)
7
d)
8
48.
The alkali earth metals have how many valence electrons?
a)
1
b)
2
c)
7
d)
8
49.
The noble gases have how many valence electrons?
a)
1
b)
2
c)
7
d)
8
50.
The halogen family members have how many valence electrons?
a)
1
b)
2
c)
7
d)
8
51.
Groups and families are the
a)
same
b)
different ones
c)
rows across
d)
noble gases only
52.
Membership in a family is based on the number of
a)
electrons
b)
valence electrons
c)
protons
d)
neutrons
53.
List atoms from least number of protons to most number of protons
a)
Ba, Na, Cl
b)
Na, Cs, Cl
c)
Na, Cl, Cs
d)
Na, Ba, Cl
54.
In the formula 3H2O, what does the 3 stand for?
a)
number of Oxygen
b)
number of Hydrogen
c)
number of water molecules
d)
Hello Kitty
55.
In the formula 3H2O, what does the 2 stand for?
a)
number of Oxygen
b)
number of Hydrogen
c)
number of water molecules
d)
Hello Kitty
56.
Elements which are shiny, conduct electricity and heat are called
a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
57.
Elements which are great insulators are
a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
58.
Elements which are considered semiconductors are
a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
59.
Two elements chemically bonded form
a)
element
b)
compound
c)
mixture
d)
solutions
60.
What does the 1 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
61.
The yellow atoms are called
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
62.
The blue atoms are called
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
63.
The atoms along the staircase are called
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
64.
How many electrons does N need to fill its outer shell?
a)
3
b)
4
c)
1
d)
2
65.
How many electrons does Oxygen need to fill its outer shell?
a)
3
b)
4
c)
1
d)
2
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