The electronic configuration of an atom having atomic number 20 is
The maximum number of electrons that can be accommodated in a sublevel for which l = 3 is
The proton is heavier than an electron by
1 u or 1 amu means
What was the source of alpha particles in Rutherford scattering experiment?
What property of an element determines its chemical behaviour ?
Which isotope is used in the nuclear power plants to generate electricity?
An atom has a mass number of 37 and atomic number 17. How many protons does it have?
The neutral atoms of all of the isotopes of the same element have
Which of the two will be chemically more reactive, Sulphur(S) with atomic number 16 or Chlorine (Cl) with atomic number 17 ?