Which of the following metal thermionically emit an electron at a relatively lowest temperature among them?

Question

Which of the following metal thermionically emit an electron at a relatively lowest temperature among them? (A) Platinum (B) Copper (C) Aluminium (D) Molybdenum

Tardigrade Admin · Accepted Answer

Molybdenum (Mo) having electronic configuration [K r] 4 d5, 5 s1, due to the presence of one unpaired electron in the outermost shell, emits it readily even at low temperature.

Q. Which of the following metal thermionically emit an electron at a relatively lowest temperature among them?

Platinum

Copper

Aluminium

Molybdenum

Molybdenum $(M o)$ having electronic configuration $[Kr] 4 d^{5}, 5 s^{1}$ , due to the presence of one unpaired electron in the outermost shell, emits it readily even at low temperature.

Q. Which of the following metal thermionically emit an electron at a relatively lowest temperature among them?

Platinum

Copper

Aluminium

Molybdenum

Molybdenum (Mo) having electronic configuration [Kr]4d5,5s1, due to the presence of one unpaired electron in the outermost shell, emits it readily even at low temperature.

Molybdenum $(M o)$ having electronic configuration $[Kr] 4 d^{5}, 5 s^{1}$ , due to the presence of one unpaired electron in the outermost shell, emits it readily even at low temperature.