The atomic mass of carbon -13 is 13 it has six protons how many neutrons does this isotope have

The characteristic 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 and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

What must occur for air masses to form fronts

Can someone me with 3 and 4 plz. this is for masteries test.