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)

EASY

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Which statement is incorrect for the d-block elements

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Important Questions on Classification of Elements and Periodicity in Properties

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

Decrease in ionic size in a period is observed in

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

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>Classification of Elements: s, p, d and f-Blocks

The last element of the

p

- block in

6^{th}

period is represented by the outermost electronic configuration:

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

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>Classification of Elements: s, p, d and f-Blocks

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>Classification of Elements: s, p, d and f-Blocks

An element of atomic number

118

would be a/an __________

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

Which of the following does not exist?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

Which of the following species is iso-electronic with

Cr ?

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

The elements with atomic numbers

101

and

104

belong to, respectively:

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

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

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

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>Classification of Elements: s, p, d and f-Blocks

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>Classification of Elements: s, p, d and f-Blocks

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>Classification of Elements: s, p, d and f-Blocks

Which among the following elements is a metalloid?

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

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>Classification of Elements: s, p, d and f-Blocks

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>Classification of Elements: s, p, d and f-Blocks

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 :

MEDIUM

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

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.

EASY

Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Classification of Elements: s, p, d and f-Blocks

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>Classification of Elements: s, p, d and f-Blocks

The element

Z = 114

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

Which statement is incorrect for the d-block elements

Important Questions on Classification of Elements and Periodicity in Properties

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