During which type of radioactive decay does a nucleus gain a proton but keep the same atomic mass number?
A. Alpha decay
B. Beta decay (electron)
C. Gamma decay
D. Beta decay (positron)
SUBMIT

A. Alpha decay

Explanation:

Beta decay (electron).

Explanation:

no sign of dia of fuel cell

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.