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Worksheets2.3.1 Practice
Total questions: 20
Worksheet time: 15mins
Chemical symbols are a way to__________.
represent elements
represent compounds
represent molecules
represent all of the above
Check all of the examples that are chemical symbols:
NaCl
H2O
Na
Fe
Chemical formulas are ways to represent _______.
different chemical compounds
different elements' symbols
different molecular configurations
different atomic structures
Check all of the possible chemical formulas:
H
CaCl2
O
H2O2
Consider copper(II) sulfate's formula, CuSO4: what is the subscript in this formula?
(a)
What does the subscript in the chemical formula represent?
the number of atoms of that particular element
the number of molecules
the number of moles of an element
none of the choices
How are chemical reactions related to chemical equations?
chemical equations represent chemical reactions
chemical reactions represent chemical equations
A substance that is formed as the result of a chemical reaction is a __________________
Product
Reactant
Starters
Enders
2H2 + O2 --> 2H2O
What does it mean when a chemical equation is "balanced?"
the same number of elements are on both sides of the equation
the same number of atoms are on both sides of the equation
the same number of compounds are on both sides of the equation
the same number of molecules are on both sides of the equation
Check all of the examples that are chemical symbols:
NaCl
H2O
Na
Fe
A substance that is dull, brittle, and a nonconductor would be classified as a
metal
nonnmetal
metalloid
Which elements are to the right of the zig zag?
metals
nonmetals
metalloids
