EASY

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Which of the following has the same electronic configuration as that of an oxide ion ?

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Important Questions on Structure of Atom

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

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

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

G d (64)

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

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

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

n = 4

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The total number of orbitals associated with the principal quantum number

5

is:

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The element with

Z = 120

(not yet discovered) will be a/an

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

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}

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

Which statement is incorrect for the periodic classification of elements?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The orbital nearest to the nucleus is

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

How many electrons can fit in each orbital for which

n = 3

and

l = 1

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

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}

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

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

15,

respectively, are:

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

If the principal quantum number

n = 6,

the correct sequence of filling of electrons will be:

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

4 d, 5 p, 5 f

and

6 p

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

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

Which one of the following statements is wrong?

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The number of unpaired electrons in

{Ni}^{2 +}

(atomic number

= 28

) are

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

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

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

Energy associated with the first orbit of

{He}^{+}

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

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

MEDIUM

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

The number of

d

-electrons in

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

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

EASY

Chemistry>Physical Chemistry>Structure of Atom>Filling of Electrons in Orbitals

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

(At. No. Z =

22

)

Which of the following has the same electronic configuration as that of an oxide ion ?

Important Questions on Structure of Atom

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