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WorksheetsElements & Compounds
Total questions: 10
Worksheet time: 55secs
Name
Class
Date
1.
Which of the following is an element?
a)
H2
b)
NaHCO3
c)
NaOH
d)
CO
2.
Which of the following substance is a compound?
a)
F2
b)
HCl
c)
N2
d)
O3
3.
Elements can be broken down into simpler substances.
a)
True
b)
False
4.
Which of the following is NOT a pure substance?
a)
water
b)
salt
c)
soil
d)
iron
5.
Which of the following is an element but NOT a metal?
a)
oxygen
b)
copper
c)
aluminum
d)
water
6.
What is a chemical compound?
a)
A subatomic particle
b)
A combination of two protons and two electrons
c)
A combination of two or more chemical elements
d)
A substance with only one kind of atom or element
7.
It is an element used to treat cancer.
a)
Iodine (I)
b)
Cobalt (Co)
c)
sodium hydroxide(NaOH)
d)
Nitric acid(HNO3)
8.
It is an element used in solar batteries.
a)
Uranium (U)
b)
Sodium (Na)
c)
Silicon (Si)
d)
Calcium carbonate(CaCO3)
9.
A compound used as nail polish remover.
a)
Sucrose(C12H22O11)
b)
Acetone(CH3COCH3)
c)
Lye(NaOH)
d)
Calcium carbonate(CaCO3)
10.
A compound used as ingredient for cooking,for polishing the teeth,household cleaning or as deodorant.
a)
Sulfuric acid(H2SO4)
b)
Sodium bicarbonate
(NaHCO3)
(NaHCO3)
c)
Sodium hydroxide(NaOH)
d)
Calcium carbonate(CaCO3)
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