MEDIUM
11th CBSE
IMPORTANT
Earn 100

Atoms of the elements belonging to the same group of periodic table will have the:
(a)Same number of protons
(b)Same number of electrons in the valence shell
(c)Same number of neutrons
(d)Same number of electrons

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Important Questions on Classification of Elements and Periodicity in Properties
HARD
11th CBSE
IMPORTANT
Eka-aluminium and Eka-silicon are known as

EASY
11th CBSE
IMPORTANT
Lanthanoids are

MEDIUM
11th CBSE
IMPORTANT
Element with valence shell electronic configuration as is placed in which of the following group and block of elements?

EASY
11th CBSE
IMPORTANT
Of the following pairs, the one containing examples of metalloid elements in the periodic table is

HARD
11th CBSE
IMPORTANT
Arrange the following in proper order of atomic size

MEDIUM
11th CBSE
IMPORTANT
Which of the following sets represents a collection of isoelectronic species? (Atomic number , ).

MEDIUM
11th CBSE
IMPORTANT
Which of the following has highest value of ionic radius?

EASY
11th CBSE
IMPORTANT
The correct order of first ionisation enthalpy among following elements is
