Radioactivity

Flashcard
•
Chemistry
•
11th Grade
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is radioactivity?
Back
Radioactivity is the process by which unstable atomic nuclei lose energy by emitting radiation. This can occur in the form of alpha particles, beta particles, or gamma rays.
2.
FLASHCARD QUESTION
Front
What is a mass number?
Back
The mass number is the total number of protons and neutrons in an atomic nucleus.
3.
FLASHCARD QUESTION
Front
How do you calculate the number of neutrons in an atom?
Back
Number of neutrons = Mass number - Atomic number.
4.
FLASHCARD QUESTION
Front
What are alpha particles?
Back
Alpha particles are positively charged particles consisting of two protons and two neutrons, emitted during radioactive decay.
5.
FLASHCARD QUESTION
Front
What are beta particles?
Back
Beta particles are high-energy, high-speed electrons or positrons emitted by certain types of radioactive nuclei.
6.
FLASHCARD QUESTION
Front
What are gamma rays?
Back
Gamma rays are high-energy electromagnetic radiation emitted from a nucleus during radioactive decay, with no mass or charge.
7.
FLASHCARD QUESTION
Front
What happens to the atomic number during alpha decay?
Back
During alpha decay, the atomic number decreases by 2.
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