Answer:
The correct option is A
Explanation:
Elements in the current periodic table are arranged according to there atomic number. Atomic number is the number of protons present in the nucleus of an atom. The nucleus however contains both the protons and the neutrons. The sum of the protons and neutrons in the nucleus gives the atomic mass of an atom. The number of protons (which are positively charged) in an atom is equal to the number of electrons (which are negatively charged) in an atom.
