carbon has six protons and six neutrons
Carbon
The number of protons defines the element. If an atom has six atoms, then it can only be carbon. If it has six neutrons, then it is 12C.
carbon or boron
An atom with six protons in the nucleus is a carbon element.
The element that has 8 protons and 8 neutrons is oxygen.
Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons. An example is carbon-12 and carbon-14, which both have six protons but differ in the number of neutrons they possess.
It is about neutrons and protons. The total of neutrons and protons.
Neon has 10 protons and 9 neutrons.
Sodium, Na, is the element that has eleven protons.
Number of protons + Number of neutrons = Mass number(number of nucleons)
They are both Isotopes of Barium. The 56 protons tell us that the element is Barium and when you add the neutrons with the protons you get barium138 and barium134. They are both stable isotobes of barium but of all the barium in the world about 72% is barium138 and 2% is barium134.
Manganese (the natural isotope 55Mn) has 25 protons and 30 neutrons.