What is an element?
Elements and Compounds
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•
Science, Chemistry
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.
2.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements chemically bond together in fixed proportions.
3.
FLASHCARD QUESTION
Front
What is the symbol for hydrogen?
Back
H
4.
FLASHCARD QUESTION
Front
What is the symbol for oxygen?
Back
O
5.
FLASHCARD QUESTION
Front
What is the chemical formula for water?
Back
H2O
6.
FLASHCARD QUESTION
Front
How many hydrogen atoms are in one molecule of water?
Back
2
7.
FLASHCARD QUESTION
Front
What is the symbol for sodium?
Back
Na
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