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:

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)