B. We drink fresh water, we cannot drink Salt Water and survive. Some food, such as kelp/seaweed/nori grows in salt water. And some food is cooked in Salt/Ocean water. ...but fresh water is used in all of the above, as well...so...the question, as posted, is open to your interpretation.
The original nucleus is known as the <em>parent nucleus</em>, and the core staying after the rot is known as the daughter nucleus
If a core radiates an alpha molecule, it loses two protons and daughternucleus in this way, the little girl core has a nuclear mass of 4 less and a nuclear number of 2 not exactly the parent core
In β-decay, a neutron is changed over into a<em> proton, electron, and electron-anti neutrino</em>
Which builds the nuclear number of the nuclide by 1. <em>For 211Pb, this would bring about a nuclide of 211Bi.</em>
