What is an atom?
Atoms, Elements, Molecules, Compounds

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Science
•
7th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
The smallest unit of an element that retains the properties of that element.
2.
FLASHCARD QUESTION
Front
What is an element?
Back
A pure substance that cannot be broken down into simpler substances by chemical means, made up of only one type of atom.
3.
FLASHCARD QUESTION
Front
What is a molecule?
Back
A group of two or more atoms bonded together, which can be of the same or different elements.
4.
FLASHCARD QUESTION
Front
What is a compound?
Back
A substance formed when two or more different elements bond together in a fixed ratio.
5.
FLASHCARD QUESTION
Front
What is the difference between a molecule and a compound?
Back
A molecule can consist of the same or different types of atoms, while a compound must consist of different types of atoms.
6.
FLASHCARD QUESTION
Front
What does the chemical formula NaCl represent?
Back
Sodium chloride, a compound made of sodium and chlorine atoms.
7.
FLASHCARD QUESTION
Front
What is a chemical bond?
Back
The force that holds atoms together in a molecule or compound.
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