Wave nature of electrons was demonstrated by :

• Schrodinger

• de-Broglie

• Davisson and Garmer

• Heisenberg

4d, 5p, 5f and 6p orbitals are arranged in the order of decreasing energy. The correct option is:

• 6p > 5f > 5p > 4d

• 6p > 5f > 4d > 5p

• 5f > 6p > 4d > 5p

• 5f > 6p > 5p > 4d

173.

Which of the following series of transitions in the spectrum of hydrogen atom fall in visible region?

• Balmer series

• Paschen series

• Brackett series

• Lyman series

Non - directional orbital is :

• 4p

• 4d

• 4f

• 3s