
Chemistry Flashcard

Flashcard
•
Science
•
7th Grade
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a chemical change?
Back
A chemical change is a process where substances combine or break apart to form new substances, often accompanied by energy changes, such as temperature increase.
2.
FLASHCARD QUESTION
Front
What is a physical change?
Back
A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.
3.
FLASHCARD QUESTION
Front
What is a compound?
Back
A compound is a substance formed when two or more elements chemically bond together in fixed proportions.
4.
FLASHCARD QUESTION
Front
What is the formula for potassium sulfate?
Back
The formula for potassium sulfate is K₂(SO₄)₂.
5.
FLASHCARD QUESTION
Front
How many atoms are in one formula unit of magnesium hydroxide, Mg(OH)₂?
Back
There are 5 atoms in one formula unit of magnesium hydroxide (1 magnesium, 2 oxygen, and 2 hydrogen).
6.
FLASHCARD QUESTION
Front
What are metals?
Back
Metals are elements that are typically shiny, good conductors of heat and electricity, and malleable.
7.
FLASHCARD QUESTION
Front
What are nonmetals?
Back
Nonmetals are elements that lack the characteristics of metals, often being poor conductors and brittle in solid form.
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