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प्रश्न
The element with positive electron gain enthalpy is
विकल्प
Hydrogen
Sodium
Argon
Fluorine
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उत्तर
Argon
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संबंधित प्रश्न
The group of elements in which the differentiating electron enters the anti penultimate shell of atoms are called ________.
Identify the wrong statement.
Which one of the following arrangements represent the correct order of least negative to most negative electron gain enthalpy
Which one of the following is true about metallic character when we move from left to right in a period and top to bottom in a group?
What is the effective nuclear charge?
Define electronegativity.
Why the first ionisation enthalpy of sodium is lower than that of magnesium while its second ionisation enthalpy is higher than that of magnesium?
Explain the following, give an appropriate reason.
The electron affinity values of Be and Mg are almost zero and those of N (0.02 eV) and P (0.80 eV) are very low.
Explain the following, give an appropriate reason.
The formation of \[\ce{F^-_{(g)}}\] from \[\ce{F_{(g)}}\] is exothermic while that of \[\ce{O^2-_{(g)}}\] from \[\ce{O_{(g)}}\] is endothermic.
State the trends in the variation of electronegativity in groups and periods.
