modern atomic theory

From the most important modification (s) on the atomic model of "Bohr" is /are

• the dual nature of the electron.

• the uncertainty principle.

• finding the suitable equation which describes the wave motion of the electron

• all of the previous.

The maximum number of electrons that saturates the principal energy level (n) is given from the rule

• 2n

• n²

• 2n²

• (2n)²

hen (n = 3) and (l = 2). So, electron is located in the sublevel

• 3s

• 3p

• 3d

• 3f

The possible values of n and l for the same electron are-----

• 0,1.5

• 3,3

• 0,1

• 2,1

The energy sublevels that form the third energy level are

• s

• s,p

• s,p,d

• s,p,d,f

When (n = 3) , (l = 2), the possible value of ml is

• -3

• 1.5

• +2

• +3

The number of orbitals for the sublevel that has the values (n = 3) , (l = 2) equals

• 2

• 3

• 5

• 7

Which of the following is saturated with the greatest number of electrons?

• An orbital of the sublevel 4f

• An orbital of the sublevel 3d

• The energy level (n = 2)

• The sublevel 3d