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WorksheetsAtoms, Elements, Compounds and Chemical Equations
Total questions: 26
Worksheet time: 23mins
Name
Class
Date
1.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
2.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
3.
The smallest particle of any particular type of matter is known by which of the following terms?
a)
Compound
b)
Atom
c)
Chemical
d)
Element
4.
If an atom has 3 electrons, how many protons does it have?
a)
1
b)
2
c)
4
d)
3
5.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
6.
A particle that moves around the nucleus is a(n)...
a)
Proton
b)
Neutron
c)
Electron
d)
Quark
7.
The first energy level can hold up to how many electrons?
a)
8
b)
4
c)
2
d)
5
8.
What is the atomic symbol for sodium?
a)
Na
b)
So
c)
NaCl
d)
S
9.
How many neutron are in the atom "K"?
a)
7
b)
2
c)
39
d)
20
10.
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
11.
What is the chemical symbol for the element Iron
a)
I
b)
Ir
c)
Fe
d)
fe
12.
An example of matter made of only one element is
a)
water
b)
gold bar
c)
light bulb
d)
salad mixture
13.
What element is found in all four areas of the earth that we studied?
a)
Sodium (Na)
b)
Oxygen (O)
c)
Carbon (C)
d)
Nitrogen (N)
14.
The two most common elements found in the oceans are__________. ( Remember oceans are made up of water).
a)
Sodium and Nitrogen
b)
Oxygen and Aluminum
c)
Iron and Carbon
d)
Oxygen and Hydrogen
15.
What is the most abundant element found in the earth's atmosphere?
a)
Oxygen
b)
Sulfur
c)
Nitrogen
d)
Argon
16.
The element that occurs in highest percentage in the crust is
a)
Calcium
b)
Oxygen
c)
Iron
d)
Potassium
17.
The percentage of Nitrogen in the earth's atmosphere is
a)
one percent
b)
seventy-eight percent
c)
fifty percent
d)
twenty-one percent
18.
CaCO3 represents a chemical
a)
Symbol
b)
Formula
c)
Subscript
d)
Reaction
19.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
20.
A molecule is________
a)
a glob of gelatinous goo
b)
smaller than an atom
c)
filled with raisons
d)
more than one atom bonded together
21.
How many Hydrogen (H) atoms are in NH3O5
a)
3
b)
4
c)
5
d)
1
22.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
23.
Which one is a compound?
a)
Co
b)
Br
c)
Fe
d)
CO
24.
Which one is an element?
a)
Co
b)
CO
c)
CO2
d)
CO3-2
25.
Mg + O > MgO What change does this equation express?
a)
2 atoms combine to form one atom
b)
2 atoms combine to form one molecule
c)
2 elements combine to form a different element
d)
2 elements combine to form 2 new elements
26.
What makes each element different from another element?
a)
the number of protons
b)
the number of electrons
c)
the number of neutrons
d)
the mass of the neucleus
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