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Element Compound Review
Test Description: Elements and compounds
Instructions: Answer all questions to get your test result.
1) An element is a _________ substance.
A
atomic
B
mixture
C
not pure
D
pure
2) Molecules are the smallest part of a ______________.
A
element
B
mixture
C
substance
D
compound
3) Compounds are made of two or more elements _____________ bound together.
A
mixed
B
melted
C
combined
D
chemically
4) A chemical formula is _____________________.
A
a series of numbers that give us a product.
B
a series of symbols that show us what is in the mixture.
C
a series of letters that equal a substance.
D
a series of chemical symbols and subscripts that show what reaction takes place.
5) The chemical formula for water is H2O. How many atoms are in a molecule of water?
A
3
B
5
C
4
D
2
6) Elements are represented by letters, either a capital or capital and lower case, called ________ __________.
A
chemical symbols
B
chemical equations
C
chemical letters
D
chemical substitues
7) Which of the following is a compound?
A
calcium
B
sodium
C
hydrogen
D
carbon dioxide
8) Which of the following is an element?
A
sodium acetate
B
calcium carbonate
C
carbon dioxide
D
sulfur
9) Baking soda, NaHCO3, has how many carbon atoms?
A
3
B
1
C
2
D
4
10) Baking soda, NaHCO3, has how many hydrogen atoms?
A
3
B
4
C
2
D
1
*select an answer for all questions
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