Chemical Formula Flashcard

Flashcard
•
Science
•
8th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more different elements are chemically bonded together. For example, CO2 (carbon dioxide) is a compound made of carbon and oxygen.
2.
FLASHCARD QUESTION
Front
What is the chemical formula for water?
Back
The chemical formula for water is H2O, which indicates it contains two hydrogen atoms and one oxygen atom.
3.
FLASHCARD QUESTION
Front
What does the subscript in a chemical formula indicate?
Back
The subscript in a chemical formula indicates the number of atoms of the element present in the molecule. For example, in H2O, the '2' indicates there are two hydrogen atoms.
4.
FLASHCARD QUESTION
Front
Is O2 a compound or an element?
Back
O2 is an element because it consists of two atoms of the same element (oxygen) bonded together.
5.
FLASHCARD QUESTION
Front
What is the difference between an element and a compound?
Back
An element is a pure substance that cannot be broken down into simpler substances, while a compound is made up of two or more different elements chemically combined.
6.
FLASHCARD QUESTION
Front
What is the chemical formula for sulfuric acid?
Back
The chemical formula for sulfuric acid is H2SO4, which contains two hydrogen atoms, one sulfur atom, and four oxygen atoms.
7.
FLASHCARD QUESTION
Front
How can you identify if a substance is a compound?
Back
A substance is a compound if it can be broken down into simpler substances (elements) through chemical reactions and has a fixed ratio of elements.
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