Element Compound Review Question Preview (ID: 39911)
Elements And Compounds.
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Which of the following is an element?
a) carbon dioxide
b) sodium acetate
c) sulfur
d) calcium carbonate
Which of the following is a compound?
a) hydrogen
b) sodium
c) carbon dioxide
d) calcium
The chemical formula for water is H2O. How many atoms are in a molecule of water?
a) 2
b) 3
c) 4
d) 5
Elements are represented by letters, either a capital or capital and lower case, called ________ __________.
a) chemical equations
b) chemical substitues
c) chemical letters
d) chemical symbols
A chemical formula is _____________________.
a) a series of numbers that give us a product.
b) a series of letters that equal a substance.
c) a series of symbols that show us what is in the mixture.
d) a series of chemical symbols and subscripts that show what reaction takes place.
Compounds are made of two or more elements _____________ bound together.
a) chemically
b) mixed
c) melted
d) combined
Molecules are the smallest part of a ______________.
a) substance
b) element
c) compound
d) mixture
An element is a _________ substance.
a) atomic
b) pure
c) mixture
d) not pure
Baking soda, NaHCO3, has how many carbon atoms?
a) 1
b) 2
c) 3
d) 4
Baking soda, NaHCO3, has how many hydrogen atoms?
a) 4
b) 3
c) 2
d) 1
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