which of the following represents the quantum numbers of the last electron in nickel atom 28 Ni

• n=3, l=2, ml= -1, ms= - ½

• n=3, l=2, ml= 0, ms= - ½

• n=3, l=2, ml= +1, ms= - ½

• n=3, l=2, ml=+1, ms= + ½

the principle which excludes the possibility of presence of a 3rd electron in an orbital is

• Aufbau principle

• Hund’s rule

• Pauli’s exclusion principle

• non

the electronic configuration 1s2, 2s2, 2p5, 3s1 shows ............

• ground state of fluorine

• excited state of fluorine

• excited state of neon

• ground state of O2-ion

the maximum value of (ml) for an electron in the 4th energy level is

• +3

• +4

• +5

• +9

In which of the following configurations there are 2 unpaired electrons?

• 1s2, 2s2

• 1s2, 2s2, 2p4

• 1s2, 2s2, 2p3

• 1s2, 2s2, 2p5

the maximum number of electrons which has the spin quantum number (ms = + ½ ) and (l=3)

• 1

• 3

• 5

• 7

Which graph represents the number of unpaired p orbital electrons for atoms with Proton numbers 13 to 18?

• A

• B

• C

• D

Gallium Nitride (GaN) could revolutionize the design of electric bulb because only a small length used as filament gives excellent light at low cost gallium nitride is an ionic compound containing Ga3+ ion what is the electronic configuration of nitrogen ion in it?

• 1s2, 2s2, 2p6

• 1s2, 2s2, 2p4

• 1s2, 2s2, 2p3

• 1s2, 2s2

he presence of 3 unpaired electrons in the ground state of nitrogen (7N) can be explained by ...........................

• The dual nature of electron

• Hund's rule

• Uncertainty principal

• Building up principal

An element with atomic number 17, its electrons can be distributed in a number of sublevels equals ....................

• 3

• 5

• 7