Question

In ground state, all the elements of group 13 of the periodic table are having same number of :

• A. nuclear particles
• B. occupied principal energy levels
• C. electrons
• D. valence electrons
• E. neutrons

Answer 1

The correct option is D valence electrons

Elements in the same group in the periodic table have similar chemical properties. This is because, their atoms have the same number of valence electrons in the highest occupied energy level.