<span>The life forms of the biosphere are located within Earth's surface.</span>
Answer: 
The chromium nucleus will complete the reaction.
Explanation:
The given reaction is a type of radioactive nuclei decay:
Positron emission: It is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. This is also known as
-decay. In this the mass number remains same.

Now according to the given reaction:

The chromium nucleus will complete the reaction.

The rate of change of velocity per unit time is called acceleration.
Its SI unit is m/s².
