Atomic Number, Atomic Mass and Mass Number
Atomic Mass Out of these the mass of electrons is infinitesimally small,hence negligible.The masses of neutrons and protons. is the mass of the atom.In day to day life we use the units as g or kg to measure mass.However the mass of neutrons and protons.being very small,such units cannot be employed. However they are compared to one another.In order to have uniformity in measurement, 1/12 th mass of Carbon 12 is taken as standard atomic mass unit.Masses of other atoms are compared with this and standardized as amu.So the atomic mass of hydrogen is 1.0079 .It means mass of hydrogen atom / 1/12 th mass of Carbon 12 =1.0079 Checkout for more information: https://chemistry.tutorvista.com/inorganic-chemistry/atomic-mass-unit.html Follow us at: https://www.facebook.com/tutorvista https://twitter.com/TutorVista
Atomic Mass Out of these the mass of electrons is infinitesimally small,hence negligible.The masses of neutrons and protons. is the mass of the atom.In day to day life we use the units as g or kg to measure mass.However the mass of neutrons and protons.being very small,such units cannot be employed. However they are compared to one another.In order to have uniformity in measurement, 1/12 th mass of Carbon 12 is taken as standard atomic mass unit.Masses of other atoms are compared with this and standardized as amu.So the atomic mass of hydrogen is 1.0079 .It means mass of hydrogen atom / 1/12 th mass of Carbon 12 =1.0079 Checkout for more information: https://chemistry.tutorvista.com/inorganic-chemistry/atomic-mass-unit.html Follow us at: https://www.facebook.com/tutorvista https://twitter.com/TutorVista