Chemistry S1 Exam 2024
Flashcard
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
Wayground Content
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a heterogeneous mixture?
Back
A heterogeneous mixture is a combination of two or more substances that remain distinct and can be easily separated, such as water, salt, coral, and fish in the Pacific Ocean.
2.
FLASHCARD QUESTION
Front
What is a homogeneous mixture?
Back
A homogeneous mixture is a mixture that has a uniform composition throughout, such as air.
3.
FLASHCARD QUESTION
Front
What is a valence electron?
Back
A valence electron is an electron in the outermost shell of an atom that can participate in forming chemical bonds.
4.
FLASHCARD QUESTION
Front
What is an atom?
Back
An atom is the smallest unit of matter that retains the properties of an element.
5.
FLASHCARD QUESTION
Front
What safety measure should be taken for long hair in a laboratory?
Back
Long hair in the laboratory must be tied back or kept entirely out of the way with a hair band to prevent accidents.
6.
FLASHCARD QUESTION
Front
What is the difference between an element and a compound?
Back
An element is a pure substance that cannot be broken down into simpler substances, while a compound is a substance formed when two or more elements chemically bond together.
7.
FLASHCARD QUESTION
Front
What is the definition of a chemical reaction?
Back
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
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