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All the lanthanoids and actinoids belong to group of the periodic table. (Write the group number)

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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>Electronic Configurations and Types of Elements
The electronic configurations of Eu (Atomic no. 63), Gd (Atomic no. 64) and Tb (Atomic no. 65) are:
HARD
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
What would be the IUPAC name for the element with the atomic number 120?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
The last element of the p- block in 6th period is represented by the outermost electronic configuration:
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
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.
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
Decrease in ionic size in a period is observed in
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
The element Z=114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
What will be the IUPAC symbol and name for the element with atomic number 123 ?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
Which among the following elements is a metalloid?
HARD
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
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:
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
State modern periodic law.
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
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>Electronic Configurations and Types of Elements
The elements with atomic numbers 101 and 104 belong to, respectively:
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
Which of the following does not exist?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
The 71st 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>Electronic Configurations and Types of Elements
Zn, Cd and Hg metals are not considered as transition metals. Give reason.
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements

The outermost subshell electronic configuration of an element is 3d5 4s2.

Write the atomic number of the element.

 

MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
How do you appreciate the special nature of Inert gases?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements
The IUPAC symbol for the element with atomic number 119 would be:
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Electronic Configurations and Types of Elements

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>Electronic Configurations and Types of Elements
Scandium is a transition element. But zinc is not. Why?