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What is the outermost electronic configuration of the most electronegative element?
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Important Questions on Classification of Elements and Periodicity in Properties
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Which of the following represents the correct order of increasing first ionization enthalpy for ?
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When the first electron gain enthalpy of oxygen is , its second electron gain enthalpy is:
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The first ionisation potential of Na is 5.1 eV. The value of electron gain enthalpy of Na + will be :
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The effective nuclear charge of an element with three valence electrons is . What is the atomic number of the element?
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Given that ionization potential and electron gain enthalpy of chlorine are and respectively. The electronegativity of chlorine on Mulliken scale, approximately equals to
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The first ionization enthalpies for three elements are and , respectively. The correct sequence of the element is:
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The correct order of atomic radii is:
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Which one of the following has largest ionic radius ?
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Which of the following indicates the correct variation in eletronegativities?
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The ionic radii of and are respectively:
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Which element has the highest first ionization potential?
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Identify the correct order of electronegativity for and .
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Among the element Li, N, C and Be, one with the largest atomic radius is
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The species and contain the same number of electrons. In which order do their radii increase?
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The electronic configuration with the highest ionization enthalpy is:
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Give a reason for the following.
Ionisation potential increases across a period, from left to right.
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Which of the following atoms has the highest first ionization energy?
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In which of the following options the order of arrangement does not agree with the variation of property indicated against it?
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The electronegativity of the given elements increases in the order
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The electronegativities of and are in the order -
