12 neutrons has nothing to do with atomic number. Atomic number is the number of protons. You might mean sodium. Sodium has an atomic number of 11, and an Atomic Mass that rounds to 23, so 23 -11 = 12 neutrons in some isotopes of sodium. but some atoms of magnesium atomic number 12 also have 12 neutrons with a mass number of 24, and probably some other element, but those are all I can think of now.
The mass of 12 protons is approximately equal to 12 atomic mass units.
The mass number would be 23 and the atomic number 11 making it sodium.
Nope, the atomic number is equal to the number of protons.
Atomic number = Number of protons. So addition of neutron has no affect on the atomic number.Isotopes of the same element are formed by the change in neutrons.
Atomic mass is the number of protons and neutrons that make up an atom. The neutron number is only the number of neutrons present in the atom. This can be found by subtracting the number of protons from the atomic mass.
You calculate the number of neutron in the nucleus of an atom by : atomic mass - atomic number = neutron number. :) hope this helps
No. of neutrons=Atomic mass - Atomic number
Atomic mass - Atomic number
The mass of 12 protons is approximately equal to 12 atomic mass units.
This is the weighted average neutron number for the naturally occurring isotopes of nickel, which has the atomic number 28 and the gram-atomic mass of 58.69. In an individual isotope, the neutron number is always the isotopic atomic mass number minus the atomic number, and the same principle applies to the weighted average neutron number for the naturally occurring isotopes of an element.
The mass number would be 23 and the atomic number 11 making it sodium.
Nope, the atomic number is equal to the number of protons.
Each magnesium atom has 12 electrons and 12 protons (which are always charged), because magnesium has an atomic number of 12. In order to find the number of neutrons, the atomic mass number must be known. The number of neutrons can be determined by subtracting the number of protons from the atomic mass number.
Atomic number = Number of protons. So addition of neutron has no affect on the atomic number.Isotopes of the same element are formed by the change in neutrons.
yes
Atomic mass is the number of protons and neutrons that make up an atom. The neutron number is only the number of neutrons present in the atom. This can be found by subtracting the number of protons from the atomic mass.
Neutrons in an atom Equation Atomic Weight - Atomic Number = The neutrons of an element Round for the final answer Example: Sodium (Na) Atomic Number: 11 Atomic Weight: 23 23-11= 12 neutrons so therefore sodium has 12 neutrons