WorksheetsAtomic Structure and Atomic Theory Unit Review
Total questions: 50
Worksheet time: 43mins
J.J. Thomson's model of the atom is given this name because he believed that electrons were spread randomly throughout a positive sphere.
plum pudding model
planetary model
billiard ball model
empty space model
Order the atomic models below from the oldest to the most recent.
2, 1, 3, and 4
1, 2, 4, and 3
3, 2, 4, and 1
3, 1, 2, and 4
Bohr proposed a model of the atom as a large positive sphere with negatively charged electrons revolving around the center in orbits. What was this model nicknamed?
The Planetary Model
The Billiard Ball Model
The Empty Space Model
The Plum Pudding Model
Which atomic model has a positively charged nucleus and a negatively charged cloud of electrons giving the atom its size?
Modern Theory Model
Plum-pudding Model
Planetary Model
Marble Model
According to modern atomic theory, electrons are found ___.
occupying unspecified regions around the nucleus, based on how much energy each electron has
in totally random and varying orbits around the nucleus
in fixed orbits at well-defined distances from the nucleus
closely attached to the nucleus
Dalton's model was a solid sphere with no subatomic particles. What was the nickname for this model?
Billiard Ball Model
Empty Space Model
Planetary Model
Plum Pudding Model
Rutherford discovered that atoms have a very tiny, positively charged center where most of the mass is found. His model was nicknamed the ___.
Empty Space Model
Plum Pudding Model
Electron Cloud Model
Billiard Ball
Whose model of an atom is displayed in the figure?
Bohr
Rutherford
Thomson
Modern Model
Which of the following correctly orders the atomic models from the oldest to the most recent?
Dalton, Thomson, Rutherford, Bohr, Electron Cloud
Dalton, Thomson, Bohr, Electron Cloud, Rutherford
Thomson, Dalton, Rutherford, Electron Cloud, Bohr
Electron Cloud, Bohr, Rutherford, Thomson, Dalton
What is the nickname for Modern Theory model?
Planetary model
Electron cloud model
Billiard ball model
Empty space model
Whose model is in the picture displayed?
Thomson
Dalton
Modern Theory (Electron Cloud Model)
Rutherford
Which subatomic particle has a positive charge?
electron
neutron
proton
Which subatomic particle has no charge (neutral)?
electron
neutron
proton
What is the mass of a proton?
1 amu
2 amu
13 amu
nearly 0 amu
The atomic mass of this subatomic particle is nearly zero.
electron
neutron
nucleus
electron cloud
The atomic mass number consists of
the total number of electrons and protons
the total number of protons and neutrons
the number of protons
the total number of electrons and neutrons
Which subatomic particles make up the nucleus of an atom?
protons and neutrons
electrons and protons
electrons, protons, and neutrons
electrons and neutrons
The subatomic particles of a neutral atom that you can find by knowing the atomic number.
neutrons and electrons
protons and electrons
protons and neutrons
The subatomic particle that determines the identity of an element.
neutron
proton
electron
What charge does the nucleus have and why?
positive - the neutrons do not have a charge and the protons are positively charged
negative - the neutrons do not have a charge and the electrons are negatively charged
neutral - the charge of the neutron dominates the positive charge of the proton
neutral - electrons negative charge cancel out the positive charge of the proton
Building block of matter is called
neutron
atom
electron
quarks
Elements on the periodic table increase by...
atomic mass
number of isotopes
mass number
atomic number
Most of the mass of an atom is contained here.
electron cloud
nucleus
Where are the electrons located?
Inside the nucleus
Outside the nucleus
The overall charge of an atom
Positive (more protons than electrons)
Negative (more electrons than protons)
Neutral (equal amount of electrons and protons)
How many neutrons are in Iron (Fe)?
26
55.847
56
30
What is the atomic mass for Nitrogen?
7
21
14.007
7.007
What is the atomic number for Aluminum (Al)?
26.982
39.982
13.982
13
How many protons are in Carbon (C)?
6
18.011
12.011
10
How many electrons are in a neutral Uranium (U) atom?
238.03
92
146
330
An atom that has lost or gained one or more electrons and has become charged either positively or negatively. The number of protons remain the same.
Ions
Isotopes
How many neutrons are in Flourine?
9
18.998
19
10
A form of an element that contains equal number of protons but different number of neutrons.
Ions
Isotopes
How many electrons are in a neutral Sulfur (S) atom?
32.065
32
16
The atomic number tells us
The number of neutrons in an atom
The total number of protons and neutrons in an atom
The number of protons and electrons in a neutral atom
The total number of protons and electrons in an atom
