Unit 2 Reading Comprehension Elements/Compounds Question Preview (ID: 47754)
Reading.
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A ______________ is a PURE SUBSTANCE that contains only one kind of atom.
a) element
b) compound
c) atom
d) mass
Elements are arranged on the __________ _________ based on their properties.
a) chemical formula
b) chemical symbol
c) gravitational pull
d) periodic table
Each element is represented by a one or two-letter abbreviation called a ____________ symbol
a) physical
b) elemental
c) chemical
d) matter
A __________ is a substance that is made when two or more elements combine.
a) element
b) compound
c) mass
d) matter
A molecule of water contains two atoms of _________ and one atom of _______
a) hydrogen, carbon
b) oxygen, hydrogen
c) hydrogen, aluminum
d) hydrogen, oxygen
Ca is the chemical symbol for which element?
a) Calcium
b) Carbon
c) Chromium
d) Gold
The element that is represented by he chemical symbol Si
a) Aluminum
b) Silicon
c) Iron
d) Sodium
The chemical symbol for sodium is
a) S
b) So
c) Si
d) Na
The chemical symbol for iron is
a) I
b) Ir
c) Fe
d) Ag
The chemical formula for water is H2O, is H20 an element or compound
a) element
b) compound
c) both
d) neither
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