Proton and neutron have similar mass, but not identical.
The atomic mass of an element depends on the weight of the protons, neutrons, and electrons (almost negligible) in one mole (6.022 x 10^23 atoms) of the element.
Number of proton = atom numberfor example:Hydrogen has 1 proton and its atom number is also 1Number of neutrons + number of protons = mass numberfor example:Hydrogen have 1 proton and and NO neutrons, so the mass number is 1Helium has 2 protons and and 2 neutrons, so the mass number is 4
The atomic mass of a radium atom is approximately 226. It is a highly radioactive element found in group 2 of the periodic table.
38 amu EDIT: This answer is INCORRECT. Electrons do not have significant mass.
Number of neutrons = Mass number - Number of protons = 4 - 2 = 2 neutrons
Protons and neutrons have approximately the same mass in an atom. Protons have a mass of about 1 atomic mass unit (amu), while neutrons have a slightly larger mass of about 1 amu.
2
The atomic mass of an element depends on the weight of the protons, neutrons, and electrons (almost negligible) in one mole (6.022 x 10^23 atoms) of the element.
Number of proton = atom numberfor example:Hydrogen has 1 proton and its atom number is also 1Number of neutrons + number of protons = mass numberfor example:Hydrogen have 1 proton and and NO neutrons, so the mass number is 1Helium has 2 protons and and 2 neutrons, so the mass number is 4
No, a hydrogen atom with a mass of 3 is not an isotope of hydrogen. Hydrogen isotopes include protium (mass 1), deuterium (mass 2), and tritium (mass 3).
It is about the helium gas. mass number of it is 4.
The atomic mass of a radium atom is approximately 226. It is a highly radioactive element found in group 2 of the periodic table.
About 2% of an atom's mass is caused by the Higgs boson. The rest is due to the effect of the Strong Nuclear Force.
38 amu EDIT: This answer is INCORRECT. Electrons do not have significant mass.
An atom of Carbon with a mass of 15 and a +2 charge must have 13 protons. This is because the atomic number of Carbon is 6, so a neutral Carbon atom would have 6 protons. Since the atom has a +2 charge, it has lost two electrons, making it a cation, and giving it 2 more protons than electrons.
Number of neutrons = Mass number - Number of protons = 4 - 2 = 2 neutrons
The atom is an isotope of helium called helium-4. It contains 2 protons and 2 neutrons in its nucleus, giving it a total atomic mass of 4 atomic mass units.