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WorksheetsAtomic Structure
Total questions: 53
Worksheet time: 28mins
Name
Class
Date
1.
John Dalton modeled the atom as a...
a)
tiny solid sphere, with a known mass
b)
a hollow sphere
c)
a marble in the middle of a stadium
d)
planets orbiting around a star
2.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
3.
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.
4.
Rutherford's model of an atom most closly resenbles...
a)
an avocado with the pit being the nucleus..
b)
an aquarium with fish swimming around to represent the positive charges.
c)
a fried egg with the yoke representing the nucleus.
d)
a stadium with a marble in the middle representing the nucleus.
5.
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.
6.
Which of the following is unique for any given element?
a)
the number of neutrons
b)
the charge on the electrons
c)
the number of protons
d)
the mass of a neutron
7.
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.
8.
The glowing of a neon light is caused by electrons emitting energy as they
a)
move from lower to higher energy levels.
b)
collide with other electrons.
c)
move from higher to lower energy levels.
d)
collide with the nucleus.
9.
The atomic mass of a single atom is
a)
the sum of the protons and neutrons in the atom.
b)
twice the number of protons in one atom of the element.
c)
a ratio based on the mass of a carbon-12 atom.
d)
a weighted average of the masses of the element’s isotopes.
10.
An atom with an unequal number of protons and electrons is said to have (a) ___.
a)
no charge
b)
balance
c)
charge
d)
unbalance
11.
Scientist who first came up with the idea and term "atom".
a)
Dalton
b)
Bohr
c)
Einstein
d)
Democritus
12.
Scientist who developed the modern idea of an atom
a)
Bohr
b)
Dalton
c)
Einstein
d)
Democritus
13.
Smallest particle of an element.
a)
atom
b)
proton
c)
electron
d)
neutron
14.
Components of atoms
a)
quarks
b)
isotpoes
c)
subatomic particles
d)
ions
15.
The dense center region of an atom
a)
electron cloud
b)
core
c)
nucleus
d)
centrino
16.
Subatomic particle that determines the identity of the atom
a)
proton
b)
nucleus
c)
electron
d)
neutron
17.
Found in the nucleus of the atom
a)
electrons only
b)
protons only
c)
neutrons and protons
d)
neutrons and electrons
18.
Determined by adding the number of protons and neutrons.
a)
atomic number
b)
atomic weight
c)
atomic mass
d)
atomic matter
19.
Hydrogen has 1 proton. It's atomic number is:
a)
0
b)
1
c)
2
d)
cannot be determined
20.
An atom has 10 protons and a mass of 18. It has __ neutrons
a)
10
b)
18
c)
28
d)
8
21.
An atom with an unequal number of protons and electrons is said to have (a) ___.
a)
no charge
b)
balance
c)
charge
d)
unbalance
22.
The element symbol for potassium:
a)
P
b)
Po
c)
Pt
d)
K
23.
The element symbol for sodium:
a)
Na
b)
N
c)
S
d)
So
24.
The charge on an ion is
a)
always positive.
b)
always negative.
c)
either positive or negative.
d)
zero.
25.
Which particle is negatively charged?
a)
proton
b)
atom
c)
neutron
d)
electron
26.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
27.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
28.
The central region of an atom where neutrons and protons are is the _________.
a)
nucleus
b)
electron cloud
c)
core
d)
center
29.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
30.
An atoms an overall charge is ________.
a)
positive
b)
depends on its mood
c)
neutral
d)
negative
31.
All atoms of the same element have the same
a)
number of neutrons
b)
number of protons
c)
mass number
d)
mass
32.
How many protons are present in phosphorus-31
a)
15
b)
16
c)
31
d)
46
33.
The element symbol for sodium is ___.
a)
Na
b)
N
c)
S
d)
So
34.
The name of the subatomic particle that determines the identity of an atom.
a)
proton
b)
nucleus
c)
electron
d)
neutron
35.
Gold has how many protons?
a)
47
b)
79
c)
31
d)
17
36.
Two isotopes of carbon are carbon-12 and carbon-14. These isotopes differ from one another by two protons.
a)
true
b)
false
37.
What is the symbol for iron?
a)
I
b)
Ir
c)
Ri
d)
Fe
38.
How many electrons would an atom of Krypton have?
a)
83.80
b)
36
c)
12
d)
none
39.
In the isotope name, Hydrogen-3, what does the 3 represent?
a)
charge
b)
mass
c)
atomic number
d)
number of electrons
40.
Which answer correctly describes the three subatomic particles?
a)
Proton (no charge), neutron (+1 charge) and electron (-1 charge)
b)
Proton (+1 charge), neutron (-1 charge), and electron (no charge)
c)
proton (+1 charge), neutron (no charge) and electron (-1 charge)
d)
Proton (-1 charge), neutron (no charge) and electron (+1 charge)
41.
What element is represented in this Bohr Model?
a)
Carbon
b)
Hydrogen
c)
Aluminum
d)
Lithium
42.
The max number of electrons for each level in a Bohr model are
a)
2, 6, 8, 32
b)
2, 8, 18, 32
c)
2, 10, 18, 32
d)
2, 8, 8, 20
43.
Who predicted that atoms of any element are different from the atoms of all other elements?
a)
John Dalton
b)
Democritus
c)
James Chadwick
d)
JJ Thomson
44.
The number 27 in the symbol pictured is the element's
a)
mass
b)
atomic number
c)
charge
d)
name
45.
How many electrons does neutral atom of nitrogen have?
a)
5
b)
6
c)
7
d)
8
46.
Which of the 2 statements are part of Dalton's main points?
a)
All atoms are identical in mass.
b)
Atoms are indivisible and all matter is made of atoms.
c)
Matter can be created and destroyed.
d)
Atoms can be divided into smaller particles.
47.
Where did the word "Atom" come from?
a)
The word 'Atom' comes from the Latin word 'atomus'.
b)
The word 'Atom' comes from the Greek word 'atomos'.
c)
The word 'Atom' is derived from the Arabic word 'atam'.
d)
The word 'Atom' originates from the Sanskrit word 'atama'.
48.
Which statement is Dalton's Theory?
a)
All matter is composed of molecules that can be divided.
b)
Atoms of different elements are identical in size and mass.
c)
Matter can be created or destroyed during chemical reactions.
d)
Matter is made up of indivisible atoms, and all atoms of a given element are identical. and atoms can not be divided.
49.
What did Thompson's experiments provide evidence of?
a)
The presence of protons in the nucleus.
b)
Atoms are made up of even smaller particles.
c)
The theory of relativity in physics.
d)
The existence of dark matter in the universe.
50.
According to Rutherford's model, where is all of the atom's positive charge concentrated?
a)
In the electron cloud surrounding the nucleus.
b)
Evenly distributed throughout the atom.
c)
In the nucleus of the atom.
d)
In the outer shell of the atom.
51.
What is an isotope?
a)
An isotope is a variant of an element with the same number of protons but different numbers of neutrons.
b)
An isotope is a molecule that contains multiple elements.
c)
An isotope is a type of chemical bond between elements.
d)
An isotope is an element with different numbers of protons and neutrons.
52.
What happens to the energy of an atom when the electron moves from one energy level to another?
a)
The energy of the atom remains constant regardless of the electron's position.
b)
Electrons do not change energy levels; they stay in a fixed position.
c)
Energy is only released when electrons are added to the atom.
d)
The energy of the atom changes; it absorbs energy when moving to a higher level and releases energy when moving to a lower level.
53.
What atom model do scientists use to describe how electrons move around the nucleus?
a)
Bohr model
b)
Thomson model
c)
The electron cloud model.
d)
Rutherford model
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