First slide

Classical atomic models

Question

The total energy of electron in an atom is a combination of potential energy and kinetic energy. If total energy is –E for an electron in an atom, then its K.E. and P.E. respectively are

Difficult

A

2E, –E
B

2E,E
C

E, –2E
D

E, –E

Solution

we know KE=–TE
                $P E = 2 \times T E$

If $T E = - E$

    $K E = E$

     $P E = 2 (- E) = - 2 E$

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