What happens to the mass number and the atomic number of the original radioactive unstable element when it undergoes beta decay

Atomic Mass remains constant

Atomic no. increases or decreases by 1

Explanation:

Due to emission of positive beta atomic no. decreases by 1

Due to emission of negative beta atomic no. increases by 1

explanation:

v=uf/(u-f)

= 5.-10/(5+10) convex lens has negative focal length

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )