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WorksheetsUnderstanding the Atom
Total questions: 34
Worksheet time: 22mins
Name
Class
Date
1.
Which particle has a positive charge?
a)
electron
b)
orbital
c)
proton
d)
neutron
2.
Choose the particle that has no charge.
a)
nucleus
b)
neutron
c)
proton
d)
electron
3.
This particle determines what element you have - the elements identity.
a)
electron
b)
proton
c)
neutron
d)
valence shell
4.
This causes the mass of the nucleus to increase.
a)
adding an electron
b)
adding a neutron
c)
more orbitals
d)
adding negatively charged particles
5.
Has a mass of 1/200th the mass of a proton.
a)
electron
b)
neutron
c)
nucleus
d)
electron cloud
6.
An electron has a _____ charge.
a)
negative
b)
positive
c)
neutral
7.
Describe an Electron Cloud?
a)
the mist outside of an atom
b)
home of the protons
c)
where electrons are located
d)
nucleus
8.
Which particles make up the nucleus of an atom?
a)
protons and neutrons
b)
electrons and protons
c)
electrons, protons, and neutrons
d)
electrons and neutrons
9.
The particles of the atom you can find by knowing the atomic number.
a)
neutrons
b)
protons and electrons
c)
protons and neutrons
d)
atomic mass
10.
The subatomic particle that determines the identity of an element.
a)
neutron
b)
proton
c)
electron
d)
outer shell
11.
What charge does the nucleus have and why?
a)
positive - the neutrons do not have a charge
b)
positive - the neutrons and protons are positively charged particles
c)
neutral - the neutral charge dominates the positive charge
d)
neutral - electrons cancel out the positive charge of the atom
12.
What is the mass number and name of an element with 8 protons and 8 neutrons?
a)
16 - Carbon
b)
16 - Oxygen
c)
24 - Oxygen
d)
8 - Neon
13.
Most of the mass of an atom is contained here.
a)
electron orbitals
b)
nucleus
c)
shells
d)
atomic #
14.
What is the number that identifies the element and the number of protons contained in each elemental atom?
a)
atomic mass
b)
mass number
c)
symbol
d)
atomic #
15.
The mass of one proton is greater than the mass of one...
a)
neutron
b)
electron
16.
Which scientist conducted experiments using alpha particles and thin gold foil, which later helped him develop his model for the atom?
a)
Ernest Rutherford
b)
Kneels Bore
c)
Niels Bohr
d)
Earnest Rutherfraud
17.
Which scientist discovered the electron, which helped him develop a model of the atom?
a)
Niels Bohr
b)
John Dalton
c)
Ernst Rutherford
d)
J.J Thompson
18.
What is an atom mostly made up of?
a)
protons
b)
electrons
c)
empty space
d)
neutrons
19.
The first person to propose a theory about an atom was
a)
Democritus
b)
Rutherford
c)
Dalton
d)
Aristotle
20.
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.
21.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively and positively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
22.
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
23.
An isotope has three forms. 30% have a mass of 4 amu, 20% have a mass of 5 amu and 50% have a mass of 3 amu. Average atomic mass will be closest to
a)
2 amu
b)
3 amu
c)
4 amu
d)
5 amu
24.
Created the atomic theory
a)
Dalton
b)
J J thomson
c)
Schrodinger
d)
Democritus
25.
A neutral atom of Carbon-13 has ________ electrons and _________ neutrons
a)
13, 13
b)
6, 7
c)
7, 7
d)
6, 6
26.
What is the meaning of "Atomos" ?
a)
very small
b)
uncuttable
c)
concealed
d)
relating to the elements
27.
According to Dalton's theory, all atoms of a particular _______ are identical.to
a)
mass
b)
element
c)
weight
d)
color
28.
He conducted the cathode-ray tube experiment.
a)
Rutherford
b)
Schrödinger / Heisenberg
c)
Dalton
d)
Thomson
29.
Atom with the same number of protons but different number of neutrons...
a)
ion
b)
isotope
c)
neutron
d)
nucleus
30.
An atom in which the protons do not equal the electrons results in a charged atom known as an...
a)
atom
b)
isotope
c)
electron
d)
ion
31.
Who theorized that elements are made of atoms which cannot be divided, created, or destroyed?
a)
Bohr
b)
Rutherford
c)
Dalton
d)
Thomson
32.
Which scientist theorized electrons travel in certain paths or energy levels?
a)
Schrödinger / Heisenberg
b)
Thomson
c)
Dalton
d)
Bohr
33.
How many electrons does a neutral carbon atom have?
a)
0
b)
2
c)
14
d)
6
34.
What is the mass number of this element?
a)
5
b)
27
c)
32
d)
59
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