Chemistry Class-11: Chapter –2. Structure of Atom – Part-5

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III Short Answer Type

Question: 22

Arrange s, p and d sub-shells of a shell in the increasing order of effective nuclear charge experienced by the electron present in them.

Answer:

Question: 23

Show the distribution of electrons in oxygen atom (atomic number 8) using orbital diagram.

Answer:

Distribution of electrons in oxygen atoms

Distribution of Electrons in Oxygen Atoms

Distribution of electrons in oxygen atoms

Question: 24

Nickel atom can lose two electrons to form . The atomic number of nickel is . From which orbital will nickel lose two electrons?

Answer:

Question: 25

Which of the following orbitals are degenerate?

Answer:

Question: 26

Calculate the total number of angular nodes and radial nodes present in 3p orbital.

Answer:

For orbital

Number of angular nodes

Number of radial nodes

Question: 27

The arrangement of orbitals on the basis of energy is based upon their value. Lower the value of , lower is the energy. For orbitals having same values of , the orbital with lower value of n will have lower energy.

I. Based upon the above information, arrange the following orbitals in the increasing order of energy.

(a)

(b)

(c)

(d)

II. Based upon the above information, solve the questions given below :

(a) Which of the following orbitals has the lowest energy?

(b) Which of the following orbitals has the highest energy?

Answer:

I. II. (a)

(b)

(c)

(d)

Question: 28

Which of the following will not show deflection from the path on passing through an electric field?

Proton, cathode rays, electron, neutron

Answer: Neutron

Question: 29

An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom?

Answer:

Question: 30

Wavelengths of different radiations are given below:

Arrange these radiations in the increasing order of their energies.

Answer: