WorksheetsUnit 3 - Atomic Structure 2021
Total questions: 29
Worksheet time: 58mins
Name
Class
Date
1.
This particle is found in the nucleus and has no charge
a)
Neutron
b)
Proton
c)
Electron
2.
This particle is found in the nucleus and has a positive charge
a)
Electron
b)
Proton
c)
Neutron
3.
This is a negatively charged particle found outside the nucleus
a)
Electron
b)
Proton
c)
Neutron
4.
This contains most of the mass of an atom
a)
Electron Cloud
b)
Nucleus
c)
Electron
5.
This is the simplest of all atoms and contains only one proton and one electron
a)
Oxygen
b)
Hydrogen
c)
Water
6.
All matter is made of what?
a)
energy
b)
atoms
c)
electrons
d)
compounds
7.
Who stated that all atoms of the same element are excacty alike?
a)
Democritus
b)
Dalton
c)
Thomson
d)
Borh
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 contribution did John Dalton make to atomic theory?
a)
He discovered that every atom was positively charged.
b)
He discovered that every element consisted of one type of atom.
c)
He discovered that atoms had nuclei.
d)
He discovered that atoms could be divided into smaller parts.
10.
An atom's overall charge is ________.
a)
positive
b)
depends
c)
neutral
d)
negative
11.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RN
12.
Who came up with this model of an atom?
a)
J.J. Thompson
b)
Ernest Rutherford
c)
Neils Bohr
d)
James Chadwick
13.
True or False: The majority of an atom is made up of empty space
a)
True
b)
False
14.
Neon has an atomic number of 10 and an atomic mass of 20.180. How many protons, electrons, and neutrons will it have?
a)
P=10 E=10 N=11
b)
P=5 E=5 N=10
c)
P=10 E=10 N=10
d)
P=10 E=5 N=5
15.
What element is pictured?
a)
Hydorgen
b)
Boron
c)
Beryllium
d)
Arsenic
16.
The atomic number for Oxygen is 8, so
a)
there are 8 protons in the atom
b)
the atomic mass is less than 8
c)
the mass of the atom is 8
d)
the atom is decaying
17.
The sum of the number of protons and the number of neutrons is called the _____
a)
atomic number
b)
mass number
c)
isotope number
d)
average weight
18.
The atomic number tells you what?
a)
number of electrons
b)
number of protons
c)
number of neutrons
d)
both electrons and protons in an atom.
19.
Rutherford's model of the atom postulated the existence of
a)
neutrons
b)
protons
c)
electron orbits
d)
all of the above
20.
If zinc has an atomic number of 30 and a mass number of 65, the correct number of protons, neutrons, and electrons, respectively, is:
a)
30,35,35
b)
30,35,30
c)
35,30,35
d)
30,65,30
21.
I am anything that has mass and takes up space!
a)
energy
b)
matter
c)
molecules
d)
atoms
22.
I am the smallest whole particle of matter.
a)
atom
b)
compound
c)
molecule
d)
mixture
23.
I am two or more atoms chemically bonded.
a)
atom
b)
compound
c)
molecule
d)
mixture
24.
I am 2 or more elements chemically bonded.
a)
atom
b)
molecule
c)
compound
d)
mixture
25.
Number of C's in 2Na₂CO₃
a)
1
b)
2
c)
3
d)
5
26.
The number of Na's in Na₂CO₃
a)
1
b)
2
c)
3
d)
6
27.
How many Elements are in the compound C2H8O ?
a)
2
b)
1
c)
3
d)
0
28.
How many total atoms are in the compound C2H8O ?
a)
11
b)
2
c)
8
d)
1
29.
A subscript is the small number below a(n) ________ that tells the number of _______ of that element.
a)
element symbol; atoms
b)
atom; element symbol
c)
subscript; protons
d)
compound; elements
100 %
