Element Compound Review Question Preview (ID: 39911)
Elements And Compounds.
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An element is a _________ substance.
a) atomic
b) pure
c) mixture
d) not pure
Molecules are the smallest part of a ______________.
a) substance
b) element
c) compound
d) mixture
Compounds are made of two or more elements _____________ bound together.
a) chemically
b) mixed
c) melted
d) combined
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.
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
Which of the following is a compound?
a) hydrogen
b) sodium
c) carbon dioxide
d) calcium
Which of the following is an element?
a) carbon dioxide
b) sodium acetate
c) sulfur
d) calcium carbonate
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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