EASY
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Give the list of factors that are affecting electronegativity.

Important Questions on Classification of Elements and Periodicity in Properties

MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
In which of the following options the order of arrangement does not agree with the variation of property indicated against it?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Most electronegativity element in the periodic table
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The ionic radii (in  Å) of N3-, O2-  and  F-  are respectively:
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The correct order of atomic radii is:
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Given that ionization potential and electron gain enthalpy of chlorine are 13eV and 4eV respectively. The electronegativity of chlorine on Mulliken scale, approximately equals to
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
When the first electron gain enthalpy (ΔHeg) of oxygen is -141 kJ/mol , its second electron gain enthalpy is:
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The correct order of electronegativity for given elements is
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The species Ar, K+ and Ca2+  contain the same number of electrons. In which order do their radii increase?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Which of the following indicates the correct variation in eletronegativities?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The most electronegative element from the following elements is:
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The formation of the oxide ion, O2-(g) , from oxygen atom requires first an exothermic and then an endothermic step as shown in below:

Og+e-⟶O-g   ;  ΔfH⊖=-141 kJ mol-1

O-g+e-⟶O2- g ;  ΔfH⊖=+780 kJ mol-1

Thus process of formation of O2- in gas phase is unfavourable though O2- is isoelectronic with neon. It is due to the fact that,
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The electronegativities of N, C, Si and P are in the order -
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na + will be :
HARD
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Among the following, the correct order of acidity is:
MEDIUM
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar ?
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Among the element Li, N, C and Be, one with the largest atomic radius is
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The first ionization enthalpies for three elements are 1314, 1680 and 2080 kJ mol-1 , respectively. The correct sequence of the element is:
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements

Arrange as directed:

S (16), O (8), Te (52), Se (34) belonging to Group 16 of the long periodic table according to increasing order of electronegativity. 

(The atomic numbers have been given within first brackets after the symbols of the elements) 

EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
The electronegativity of the given elements increases in the order
EASY
Chemistry>Inorganic Chemistry>Classification of Elements and Periodicity in Properties>Periodic Trends in the Properties of Elements
Identify the correct order of electronegativity for Mg,B,Si and S.