Number of Protons in the Nucleus of an Atom

Atom

Atoms are the small particles of which every element is made up of. The atom possesses the properties of its element. Every atom consists of nucleus at its center core and electrons around the nucleus.

Discovery of Nucleus

Initially, it was faraday who used the word "nucleus" in the year 1704 which describes the atom's central point. Later Rutherford discovered positively charged nucleus at the center of the atom.

Discovery of Nucleus

Nucleus

The nucleus of an atom comprises of positive charge which consists of positively charged protons and neutrons which are of neutral charge. So, protons and neutrons are together called as nucleons and the total charge of the nucleus is positive. The total mass of the atom is the collective mass of the nucleons and the nucleus size is of the order of Fermi meters which are smaller than that of the atom.


  

Atomic number

Atomic number is the total number of protons in an atom and the atomic mass number is the total number of protons and neutrons. The nucleus of an atom comprises of positive charge which consists of positively charged protons and neutrons which are of neutral charge. So, protons and neutrons are together called as nucleons and the total charge of the nucleus is positive. The positively charged nucleus is surrounded by negatively charged electrons and the electron number is equal to that of the proton number.

For example, krypton's atomic number is 36. So, atom of krypton possesses 36 protons in its nucleus and also every atom of krypton contains 36 protons. The total charge of protons is the charge of the nucleus and addition or removal of protons will change the nucleus charge and as well as the atomic number.

The following figure shows the nucleus of an atom

Nucleus of an Atom