Shaalaa.com | Atomic mass & atomic number
The atom of an element is made up of 4 protons, 5 neutrons and 4 electrons. What are its atomic number and mass number?
The atomic number and mass number of sodium are 11 and 23 respectively. What information is conveyed by this statement?
From the symbol `""_12^24"Mg"`
, state the mass number, the atomic number and electronic configuration of magnesium.
Sulphur has an atomic number 16 and a mass of 32.
State the number of protons and neutrons in the nucleus of sulphur. Give a simple diagram to show the arrangement of electrons in an atom of sulphur.
Draw the orbital diagram of `""_20^40"Ca"^(2+)` ion and state the number of three fundamental particles present in it.
From the symbol `""_2^4"He"` for the element helium, write down the mass number and the atomic number of the element.