The mass number of an element is equal to the number of protons plus the number of neutrons.
Two atoms with the same number of protons but different numbers of neutrons are called "isotopes".
Sodium atoms always have 11 protons. Since the mass number is the sum of protons and neutrons, one can find the number of neutrons by subtracting the number of protons from this number. Thus, sodium 25 has 14 neutrons.
Atoms of the same element differ in the number of neutrons in their nuclei. All atoms of a given element have the same number of protons, of course. The number of protons in a nucleus determines which element the atom is. But the number of neutrons can vary, and these different "versions" of a given element are called isotopes of that element. See the related question, which is linked below.
Chlorine atoms always have 17 protons. The number of neutrons equals the mass number of the isotope named minus the number of protons: in this instance, 35 - 17 or 18.
Carbon's atomic number is 6, therefore it has 6 protons in its atoms. Mass number is the sum of protons and neutrons in the nucleus, which is 6 + 5 = 11.
The sum of protons and neutrons in an atom is called mass number.
Atoms which have different number of protons and neutrons but have the same molecular weight are called Isobars.
Atoms with more protons than neutrons are simply isotopes of an element. Atoms of an element always have the same number of protons. However, the number of neutrons can vary and can be higher, lower, or equal to the number of protons.
You are prolly asking this for an online true/false test or something, but the answer is no, not necessarily. They do always have the same number of electrons and protons however.
The atomic particle that determines a specific isotope is the number of neutrons in the nucleus of an atom. Isotopes are different forms of an element that have the same number of protons but a different number of neutrons. The number of neutrons affects the mass of the atom and gives rise to different isotopes with varying atomic weights.
Isotopes are atoms of the same element, having the same number of protons but different number of neutrons.
The mass number of an element is equal to the sum of the elements neutrons and protons.
Neutrons. If the differ in electrons they are not neutral and if they differ in protons then they are no longer the same element as the number of protons determines the name of the element.
neutrons + protons = mass number
Well, this is not exact, but smaller atoms have about the same number (and mass) of neutrons and of protons. Heavier atoms have a larger percentage of their mass in neutrons.Well, this is not exact, but smaller atoms have about the same number (and mass) of neutrons and of protons. Heavier atoms have a larger percentage of their mass in neutrons.Well, this is not exact, but smaller atoms have about the same number (and mass) of neutrons and of protons. Heavier atoms have a larger percentage of their mass in neutrons.Well, this is not exact, but smaller atoms have about the same number (and mass) of neutrons and of protons. Heavier atoms have a larger percentage of their mass in neutrons.
Two atoms with the same number of protons but different numbers of neutrons are called "isotopes".
A diamond is composed of carbon atoms. The atomic number of carbon is 6, so all carbon atoms have 6 protons in their nuclei. The number of neutrons depends on the isotope of carbon. Carbon-11 atoms have 5 neutrons, carbon-12 atoms have 6 neutrons, carbon-13 atoms have 7 neutrons, and carbon-14 atoms have 8 neutrons. Refer to the related links below to see the Wikipedia articles on carbon and diamond.