Interpretation: Change in
Concept Introduction: An unstable atom tries to gain stability during radioactivity, particles like Alpha, Beta, and Gamma rays are emitted by an atom.
Answer to Problem 40A
Symbol and charge of Alpha particle, Beta particle, Gamma rays are as follows:
Mass Number | Atomic Number | |
Beta Particle | Unchanged | Increases by 1 |
Alpha Particle | Decreases by 4 | Decreases by 2 |
Gamma Ray | Unchanged | Unchanged |
Explanation of Solution
Given Information: Mass number and atomic number will be affected by the loss of Alpha particles, Beta particles, and Gamma rays.
Emission of a Beta particle increases the atomic number by 1 whereas the mass number remains unchanged.
Emission of an Alpha particle reduces the mass number by 4 units whereas the atomic number by 2 units.
Gamma ray has no mass and no charge. So, it does not make any difference to the mass and the atomic number.
Mass Number | Atomic Number | |
Beta Particle | Unchanged | Increases by 1 |
Alpha Particle | Decreases by 4 | Decreases by 2 |
Gamma Ray | Unchanged | Unchanged |
Chapter 25 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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