Match the element in column I with that in column II. Column-I Column-II (a) Copper (p) Non-metal (b) Fluorine (q) Transition metal (c) Silicon (r) Lanthanoid (d) Cerium (s) Metalloid Identify the correct match :

(a)-(q), (b)-(p), (c)-(s), (d)-(r)

(a)-(q), (b)-(s), (c)-(p), (d)-(r)

(a)-(s), (b)-(r), (c)-(p), (d)-(q)

(a)-(p), (b)-(q), (c)-(r), (d)-(s)

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Periodic classification of elements can be done on the basis of electronic configuration and is used to examine the

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Important Questions on Classification of Elements and Periodicity in Properties

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The electronic configurations of Eu (Atomic no.

63

), Gd (Atomic no.

64

) and Tb (Atomic no.

65

) are:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The

71^{st}

electron of an element

X

with an atomic number of

71

enters the orbital:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Decrease in ionic size in a period is observed in

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

To which group of the periodic table does an element having electronic configuration

[Ar] 3 d^{5} 4 s^{2}

belong?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The elements with atomic numbers

101

and

104

belong to, respectively:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

An element of atomic number

118

would be a/an __________

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The last element of the

p

- block in

6^{th}

period is represented by the outermost electronic configuration:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Which of the following species is iso-electronic with

Cr ?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The set that contains atomic numbers of only transition elements, is :

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Consider the following radioactive decays

I. ${}_{92}U {\overset{- α}{⟶}}_{90} Th$ and

II. $_{90} Th \overset{- α}{⟶} {}_{88}{Ra}$

In which case group of parent and daughter elements remains unchanged.

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Among the given configurations, identify the element which doesn't belong to the same family as the others?

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The electronic configurations of bivalent europium and trivalent cerium are:
(atomic number:

X e = 54

C e = 58

E u = 63)

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The element with outer electronic configuration

(n - 1) d^{2} n s^{2}

, where

n = 4

, would belong to

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Which among the following elements is a metalloid?

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The electron configuration of

F e^{3 +}

is (atomic number of

F e = 26

)

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Element "

E

" belongs to the period

4

and group

16

of the periodic table. The valence shell electron configuration of the element, which is just above "

E

" in the group is

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Match the element in column I with that in column II.

	Column-I		Column-II
(a)	Copper	(p)	Non-metal
(b)	Fluorine	(q)	Transition metal
(c)	Silicon	(r)	Lanthanoid
(d)	Cerium	(s)	Metalloid

Identify the correct match :

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

Which of the following does not exist?

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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The correct match among the following is

(a) Lithium, Sodium, Potassium (i) Alkaline earth metals
(b) Beryllium, Magnesium, Calcium (ii) Semi-metals
(c) Oxygen, Sulphur, Selenium (iii) Alkali metaIs
(d) Silicon, Germanium, Arsenic (iv) Chalcogens

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Modern Periodic Law and the Present Form of the Periodic Table

The element

Z = 114

has been discovered recently. It will belong to which of the following family/group and electronic configuration?

Periodic classification of elements can be done on the basis of electronic configuration and is used to examine the

Important Questions on Classification of Elements and Periodicity in Properties

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