Atomic Structure

Mass of proton is

• 1.6726×10^–27g

• 9.1095×10^–31kg

• 1.6726×10^–24 g

• 5.4858amu

Which atomic orbital has highest energy

• 4d

• 4f

• 5s

• 5p

The value of four quantum numbers of valence electron of an element are

n = 4, = 0, m = 0 and s = +1/2. The element is

• Li

• K

• Sc

• Na

The atomic number of an element is 30. How many s, p and d-electrons respectively it possesses in ground state?

• 8, 19, 8

• 8, 12, 10

• 10, 15, 10

• 8, 18, 11

The principal quantum number of an atom is related to

• Orientation of orbital in space

• Spin of electron around its own axis

• Size of the orbital

• Shape of orbita

The third electron of Li atom will have quantum number values

• A

• B

• C

• D

The ground state electronic configuration of nitrogen atom can be represented as

• A

• B

• C

• D

The set of elements which violates Auf bau principle is

• Cr and Co

• Cu and Co

• Cr and Cu

• Cr and M

The shape of 1s, 2s and 3s is

• Different

• Linear

• Similar

• Flate

The value of n = 3. What are probable values of azimuthal quantum number ‘ ’

• 0,1,2,3

• 0,1,2

• 0,1

• 1,2,3,4