Element with the atomic mass 23?
Atomic Mass: 23
Atomic Number: 11
Chemical Symbol: Na
Element Name: Sodium
What is the atomic number and the mass number of an atom of an element with 11 protons and 12 neutrons?
Not technically, it is the measurement of the mass of the nucleus within the atom of the element, which is not equal to the entire mass of the element, but most of it. For instance, an element with an atomic mass of 1 (hydrogen) has one particle within it's nucleus. Actually, its the mass of 1 mole of an element (a mole being 6.02x10^23 atoms) So 6.02x10^23 hydrogen atoms= 1 gram