Chemical Formulas

Flashcard
•
Science
•
8th Grade
•
Hard
Standards-aligned
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a chemical formula?
Back
A chemical formula is a way of expressing the composition of a substance using symbols for its constituent elements and numbers to indicate the quantity of each element.
Tags
NGSS.MS-PS1-1
2.
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 one molecule of the compound.
Tags
NGSS.MS-PS1-1
3.
FLASHCARD QUESTION
Front
What is the chemical formula for methane?
Back
The chemical formula for methane is CH₄, indicating one carbon atom and four hydrogen atoms.
Tags
NGSS.MS-PS1-1
4.
FLASHCARD QUESTION
Front
How do you determine the total number of atoms in a chemical formula?
Back
To determine the total number of atoms, add the subscripts of all elements in the formula.
5.
FLASHCARD QUESTION
Front
What is the significance of the coefficient in a chemical formula?
Back
The coefficient indicates the number of molecules of the compound present.
6.
FLASHCARD QUESTION
Front
What is the chemical formula for water?
Back
The chemical formula for water is H₂O, indicating two hydrogen atoms and one oxygen atom.
Tags
NGSS.MS-PS1-1
7.
FLASHCARD QUESTION
Front
How many atoms are in one molecule of carbon dioxide (CO₂)?
Back
There are three atoms in one molecule of carbon dioxide: one carbon atom and two oxygen atoms.
Tags
NGSS.MS-PS1-1
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