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WorksheetsChemistry Atom
Total questions: 21
Worksheet time: 13mins
Name
Class
Date
1.
What are the 3 particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
2.
What is the number of protons that the element in this image contain?
a)
14
b)
7
c)
15
d)
18
3.
How many neutron are in the atom "K"?
a)
17
b)
20
c)
39
d)
12
4.
Most of the mass in an atom is concentrated in the...
a)
electrons
b)
nucleus
c)
protons
d)
empty space
5.
"C" is the element symbol for which element?
a)
calcium
b)
carbon
c)
chlorine
d)
cadmium
6.
True or False? Neutrons have a negative charge
a)
True
b)
False
7.
If I gain electrons I become
a)
Positive because I've added to my atom
b)
negative because I've added electrons
c)
same because i'm balanced
d)
equal because now I have electrons
8.
The proper formula for magnesium hydroxide:
a)
MgOH
b)
Mg2OH
c)
Mg(OH)2
d)
Mg2OH2
9.
How do the following two elements bond together?
Al3+ O2-
a)
AlO
b)
Al2O3
c)
Al3O6
d)
Al3O2
10.
An ion with a positive charge is a/an
a)
anion
b)
cation
11.
An isotope of an element has the same number of _________, but a different number of _________.
a)
Protons, electrons
b)
Protons, neutrons
c)
Electrons, neutrons
12.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
13.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
14.
A molecule is made up of
a)
one or more mixtures.
b)
one or more compounds.
c)
one or more atoms.
d)
one or more solutions.
15.
Which scientific law states that an atom cannot be created or destroyed:
a)
Law of Conservation of Matter
b)
Law of Gravity
c)
Law of Conservation of Mass
d)
Law of Motion
16.
Which best describes a chemical reaction?
a)
Products --> Reactants
b)
Reactants --> Products
17.
The element Tellurium has the atomic mass of 127.60 and its atomic number is 52. How many neutrons are in the element Tellurium?
a)
179.60
b)
127.60
c)
52
d)
76
18.
Water is an element?
a)
true
b)
false
19.
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
20.
Who discovered the neutrally charged subatomic particles?
a)
Dalton
b)
Goldstein
c)
J.J. Thomson
d)
Chadwick
21.
How many atoms of Nitrogen are in this molecule?
a)
3
b)
2
c)
0
d)
1
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