Tutor profile: Rana M.

What is the difference between atomic number and mass number?

Atomic number is the number of protons in each element and thus it is unique to that element Mass number is the number of protons and neutrons, could vary in each element, thus this is what isotopes are. Isotopes are atoms of the same elements that different in the neutron number, remembering that the proton number is always the same. Subtracting the atomic mass by the proton number will indicate how many neutrons are in the atom.

Why do glycolysis occur in almost every organism?

Because the 2 ATP, and NADH produced in glycolysis fuel many other metabolic processes in the body and depending on the organisms needs, this can be producing as many as 34 ATP or as low as 2 other ATP.

How do the periodic trends align with the atom's mass?

As you move right and down through the periodic table, the atomic radius gets smaller because the nucleus gets bigger, therefore the positive protons attract the negative electron making the entire radius (From nucleus to electron smaller)