EASY
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With reference to periodic table, which of the following does not belong to the set of magic numbers ?

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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>Genesis of Periodic Classification
Mendeleev's periodic law states that the properties of elements are a periodic function of their
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification

Identify the incorrect match.

Name IUPAC Official Name
(a) Unnilunium (i) Mendelevium
(b) Unniltrium (ii) Lawrencium
(c) Unnilhexium (iii) Seaborgium
(d) Unununium (iv) Darmstadtium
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
Which one of the following statements for D.I. Mendeleev, is incorrect ?
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
Which of the given atoms has the greatest electron affinity?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
The electronic configurations of Eu (Atomic no. 63), Gd (Atomic no. 64) and Tb (Atomic no. 65) are:
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
In which of the following options, the law of triad is applicable?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
The atomic number of the element unnilennium is :
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
The element Z=114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
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>Genesis of Periodic Classification
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>Genesis of Periodic Classification
The neutral oxide among the following is
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification

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>Genesis of Periodic Classification
A teacher asked to give an example for Dobereiner’s triad, Ramu wrote them as “Li, Na, Mg”, In these three, identify which element does not belong to this triad?
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
Which one of the following element is represented as Eka-Silicon in Mendeleev's periodic table?
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Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
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>Genesis of Periodic Classification
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>Genesis of Periodic Classification
The IUPAC symbol for the element with atomic number 119 would be:
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification

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 :

EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
Which of the following is a metalloid?
HARD
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Genesis of Periodic Classification
What would be the IUPAC name for the element with the atomic number 120?