6C12 contains ................... protons and ............. neutrons.
Mass number of carbon=12
Atomic number of carbon =6
number of protons= atomic number=6
number of neutrons = mass number - number of protons= 12-6=6
Atoms consists of protons, neutrons and electrons. If the mass of neutrons and electrons were made half and two times respectively to their actual masses, then the atomic mass of 6C12
Mercury contains 80 protons and 80 electrons and 120 neutrons. Its mass number is....................
An atom consists of protons surrounding a nucleus that contains electrons and neutrons.