The number of electrons in an element with atomic number A and mass number B will be
The number of electrons in a neutral atom with atomic number X and mass number Y will be:
An ion X2+ contains 18 electrons and 20 neutrons. Calculate the atomic number and mass no. of element X. Name the element X.
If the number of electrons in a neutral atom is 6 and the number of neutrons is 8. Then the atomic mass of that element will be ___.