Organisms get the energy and building materials that they need from food. what is the ultimate source of energy for food?

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.

What is the number of neutrons in an atom with atomic mass of 35

What does a numerical subscript following an element in a chemical formula mean?