The number of protons in an element is called the atomic number.
The number of protons in an atom is its atomic number.
Boron has 5 protons
Calcium: The identity of an element is determined by how many protons each atom of the element has, and calcium is the name of the element with 20 protons per atom.
Boron
it's Uranium
All atoms contain protons and neutrons (with the only exception of the 1H atom, which has only a single proton).
The number of protons in an atom is listed on the perioidic table by the atomic number. This is a single integer listed next to the name of the atom. Example: Hydrogen has (1) and Barium has (56).
Protons and neutrons exist in the nucleus of an atom. The electrons in an atom exist outside the nucleus. All elements have at least one proton; in fact the number of protons, which are positively charged, determines which element it is. Normally, all the elements except hydrogen (H) also contain neutrons, which have no charge (they're neutral, hence their name.)
The proton! The number of protons in an atom's nucleus is the "ID card" of that atom. If an atom has 6 protons, it's carbon. If it doesn't have 6 protons, it's not carbon. Simple as that!
Lead (Pb)
Number of protons + Number of neutrons = Mass number(number of nucleons)