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The number of unpaired electrons in an atom whose electronic configuration is $1 s^{2}, 2 s^{2}, 2 p^{3}$ is:

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Important Questions on Atomic Structure

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

Which statement is incorrect for the periodic classification of elements?

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

The number of valence electrons in an atom with electronic configuration

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{3}

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

G d (64)

has __ unpaired electrons with sum of its spin as __.

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

Aqueous solution of which of the following salts will not contain ions with the electronic configuration

1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

The group number, number of valence electrons, and valency of an element with atomic number

15,

respectively, are:

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

The electronic configuration which obeys Hund's rule for the ground state of carbon atom is

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

The element which readily forms an ionic bond has the electronic configuration

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

The orbital nearest to the nucleus is

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

The element with

Z = 120

(not yet discovered) will be a/an

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

If the principal quantum number

n = 6,

the correct sequence of filling of electrons will be:

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

The total number of orbitals associated with the principal quantum number

5

is:

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

How many electrons can fit in each orbital for which

n = 3

and

l = 1

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

4 d, 5 p, 5 f

and

6 p

orbitals are arranged in the order of decreasing energy. The correct option is:

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

The maximum number of electrons that can be filled in the shell with the principal quantum number

n = 4

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

The number of unpaired electrons in

{Ni}^{2 +}

(atomic number

= 28

) are

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

Which of the following electron is most tightly bound to the nucleus?

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

Energy associated with the first orbit of

{He}^{+}

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

The number of

d

-electrons in

{Fe}^{2 +} (Z = 26)

is not equal to the number of electrons in which one of the following?

MEDIUM

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

Which one of the following statements is wrong?

EASY

Chemistry>Physical Chemistry>Atomic Structure>Electronic Configuration of Atoms

Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?

(At. No. Z =

22

)

The number of unpaired electrons in an atom whose electronic configuration is 1s2, 2s2, 2p3 is:

Important Questions on Atomic Structure

Learn and Prepare for any exam you want !

The number of unpaired electrons in an atom whose electronic configuration is $1 s^{2}, 2 s^{2}, 2 p^{3}$ is: