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