Elements, Compounds & Counting Atoms

Flashcard
•
Science
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What does the subscript in a chemical formula tell you?
Back
It tells you how many atoms of an element are present in a molecule.
2.
FLASHCARD QUESTION
Front
Which of the following is a molecule of a compound? H2, Cl2, H2O, F2
Back
H2O is a molecule of a compound.
3.
FLASHCARD QUESTION
Front
How many atoms does an element have if no subscript is shown?
Back
1 atom.
4.
FLASHCARD QUESTION
Front
How many elements are in the chemical formula HCl?
Back
2 elements.
5.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements chemically bond together.
6.
FLASHCARD QUESTION
Front
What is the difference between an element and a compound?
Back
An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms.
7.
FLASHCARD QUESTION
Front
What does the formula H2O represent?
Back
It represents water, which is a compound made of 2 hydrogen atoms and 1 oxygen atom.
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