
Unit 1 Part 1 Review
Flashcard
•
Chemistry
•
9th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is an ion?
Back
An ion is an atom that has lost or gained electrons, resulting in a net charge.
2.
FLASHCARD QUESTION
Front
What happens to the atomic number of an element during gamma decay?
Back
The atomic number remains the same.
3.
FLASHCARD QUESTION
Front
Can the number of protons in an atom change?
Back
No, each atom has a unique number of protons that does not change.
4.
FLASHCARD QUESTION
Front
What charge do electrons carry?
Back
Electrons are negatively charged particles.
5.
FLASHCARD QUESTION
Front
After three half-lives, what fraction of a radioactive sample remains?
Back
1/8 of the sample remains.
6.
FLASHCARD QUESTION
Front
What is the definition of half-life?
Back
Half-life is the time required for half of a sample of a radioactive substance to decay.
7.
FLASHCARD QUESTION
Front
What is the relationship between protons and atomic number?
Back
The atomic number of an element is equal to the number of protons in its nucleus.
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