WorksheetsGen Chem Atomic Structure
Total questions: 35
Worksheet time: 36mins
Subatomic particle with a charge of 0
neutron
proton
electron
quark
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
Subatomic particles with a positive charge
neutrons
atomic mass
protons
isotopes
These will determine what element an atom is.
number of neutrons
number of electrons
number of atoms
number of protons
The number 16 for the atomic element sulfur is the
ionic number
isotope
atomic mass
atomic number
How many protons does sulfur have?
32
16
48
12
How many electrons does sulfur have
16
32
48
12
In an atom, the number of protons is equal to the number of ____________.
energy levels
neutrons
neurons
electrons
What is the atomic mass of "F"
9
18
17
19
An atom of the element with atomic number 6 always has _____.
six protons in its nucleus
an atomic mass of six
more than six neutrons
six electron clouds
What are subatomic particles?
the nucleus
electron cloud
positive charge
electrons, protons, and neutrons
How many protons are in this element?
79
196
117
Cannot be determined
How many electrons does potassium K contain? (click to see image)
19
39
20
40
How many neutrons does a Hydrogen atom have?
1
2
3
0
How many neutrons does an Oxygen atom have?
8
16
24
7.999
How many protons are in Beryllium?
4
9
5
2
What is the atomic number of the atom pictured?
9
10
18
19
Which of the following determines the identity of an element?
number of protons
atomic mass
number of neutrons
number of shells
Where is most of the mass in an atom located?
in the nucleus
in the protons
in the neutrons
in the electrons
An element with a mass number of 11 and an atomic number of 5 has how many neutrons?
11
5
6
16
Match the term to the statement
proton
positive charge
neurton
neutral charge
electron
negative charge
Smallest of the 3 subatomic particles
protons
neutrons
electrons
Electrically neutral particles in the nucleus
atoms
neutrons
protons
electrons
which atomic particle has the positive charge?
proton
electron
neutron
quark
Which part of the atom has a negative charge?
proton
electron
neutron
lepton
In the Bohr model, how do electrons travel?
Electrons move in and out of the nucleus
Electrons do not move
Electrons move in circular orbits around the nucleus
Electrons move in a straight line
What is the name of this element?
Helium
Hydrogen
Argon
Silver
The characteristic color bands that a hot, dilute gas emits when viewed with a spectroscope are called...
emission spectra
absorption spectra
continuous spectra
black body radiation
The _____ determines the color of visible light.
wavelength
speed
amplitude
light
Emission of light from an atom occurs when an electron
drops from a higher to a lower energy level.
jumps from a lower to a higher energy level.
moves within its atomic orbital.
falls into the nucleus.
Four gas spectra are given. What gases are in the unknown mixture?
Gas B & Gas D
Gas C & Gas B
Gas A & Gas D
Gas D & Gas C
When atoms _____________ energy, their electrons move to higher energy levels. These electrons _____________ energy by emitting light when they return to lower energy levels.
lose, absorb
absorb, lose
lose, lose
absorb, absorb
Magnesium has three naturally occurring isotopes:
Mg-24 with an abundance of 78.99%,
Mg-25 with an abundance of 10.00%, and
Mg-26 with an abundance of 11.01%.
Determine the average atomic mass of magnesium. Show your work using the math editor.
Two naturally occurring isotopes of aluminum exist, Al-26 and Al-27. Aluminum’s atomic mass is 26.98 u. What can you conclude about the relative abundance of each isotope?
Aluminum-27 is more abundant than Aluminum-26
Aluminum-26 is more abundant than Aluminum-27
Aluminum-27 and Aluminum-26 have equal abundance.
The abundance of each isotope cannot be determined using atomic mass.
Explain how the discovery of the neutron contributed to the development of atomic theory.
It explained the existence of isotopes.
It led to the discovery of electrons.
It confirmed the existence of protons.
It disproved the existence of the nucleus.
