Counting Atoms
Flashcard
•
Science
•
9th - 12th Grade
•
Practice Problem
•
Hard
Wayground Content
FREE Resource
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15 questions
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1.
FLASHCARD QUESTION
Front
What is an atom?
Back
An atom is the smallest unit of matter that retains the properties of an element.
2.
FLASHCARD QUESTION
Front
What is a molecule?
Back
A molecule is a group of two or more atoms bonded together.
3.
FLASHCARD QUESTION
Front
How do you determine the number of atoms in a chemical formula?
Back
Count the subscripts in the formula; if there is no subscript, it is assumed to be 1.
4.
FLASHCARD QUESTION
Front
What does the subscript in a chemical formula indicate?
Back
The subscript indicates the number of atoms of the element in the molecule.
5.
FLASHCARD QUESTION
Front
In the compound H₂O, how many hydrogen atoms are there?
Back
There are 2 hydrogen atoms.
6.
FLASHCARD QUESTION
Front
In the compound (NH₄)₂CrO₄, how many nitrogen atoms are there?
Back
There are 2 nitrogen atoms.
7.
FLASHCARD QUESTION
Front
How many total atoms are in the molecule C₂H₈O?
Back
There are 12 total atoms (2 Carbon, 8 Hydrogen, 1 Oxygen).
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