What is a chemical formula?
8th Grade Science Review

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•
Science
•
8th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Back
A representation of a substance using symbols for its constituent elements, indicating the number of atoms of each element.
2.
FLASHCARD QUESTION
Front
How do you calculate average speed?
Back
Average speed is calculated using the formula S = d/t, where S is speed, d is distance, and t is time.
3.
FLASHCARD QUESTION
Front
What is a valence electron?
Back
Electrons in the outermost energy level of an atom that are involved in chemical bonding.
4.
FLASHCARD QUESTION
Front
What is the easier walking path if Path B to C is about the same distance as Path E to N?
Back
Path B to C is the easier walk.
5.
FLASHCARD QUESTION
Front
What was Wegener's hypothesis about continental movement called?
Back
The Continental Drift.
6.
FLASHCARD QUESTION
Front
What is the definition of a coefficient in a chemical equation?
Back
A number placed in front of a chemical formula to indicate how many molecules or atoms are involved in the reaction.
7.
FLASHCARD QUESTION
Front
What is the significance of the atomic number?
Back
The atomic number represents the number of protons in the nucleus of an atom, determining the element's identity.
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