EASY
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Which group of the Periodic Table contains coinage metal?

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Important Questions on Classification of Elements and Periodicity in Properties

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

It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power 'n' i.e. vn of X-rays emitted is plotted against atomic number Z, the following graph is obtained.

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The value of 'n' is

 

EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern 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>Periodic Law and the Modern Periodic Table
The last element of the p- block in 6th period is represented by the outermost electronic configuration:
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is
Given v= Frequency of X-ray emitted
         Z= Atomic number
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
State modern periodic law.
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
The pair of lanthanides with exceptionally high 3rd ionisation enthalpy than neighbouring elements:
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
The electronic configurations of bivalent europium and trivalent cerium are:
(atomic number: Xe=54 , Ce=58 , Eu=63)
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern 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

MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
Write the merits of the modern periodic table over Mendeleev's Periodic table. 
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table

Give scientific reasons: 

Elements belonging to the same group have the same valency.  

EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
The 71st electron of an element X with an atomic number of 71 enters the orbital:
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table

Consider the following radioactive decays

I. U92⟶-α90Th and

II. 90Th⟶-αRa88

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

EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
The element Z=114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table

Match List - I with List - II

LIST-I
(Atomic number)		 LIST-II
(Block of periodic
table)
(A) 37 I. p-block
(B) 78 II. d-block
(C) 52 III. f-block
(D) 65 IV. s-block

Choose the correct answer from the options given below:

EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
For the following Assertion and Reason, the correct option is:
Assertion: For hydrogenation reactions, the catalytic activity increases from Group 5 to Group 11 metals with maximum activity shown by Group 7-9 elements.
Reason: The reactants are most strongly adsorbed on group 7-9 elements.
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
The set that contains atomic numbers of only transition elements, is :
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
The elements with atomic numbers 101 and 104 belong to, respectively:
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
Decrease in ionic size in a period is observed in
HARD
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
Five elements A, B, C, D and E have atomic numbers of 2,3,7,10 and 18 respectively. The elements which belong to the same period of the periodic table are:
HARD
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Law and the Modern Periodic Table
What would be the IUPAC name for the element with the atomic number 120?