GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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high ionization energy and poor electrical conductivity
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high ionization energy and good electrical conductivity
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low ionization energy and poor electrical conductivity
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low ionization energy and good electrical conductivity
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Detailed explanation-1: -Elements that tend to gain electrons to form anions during chemical reactions are called non-metals. These are electronegative elements with high ionization energies. They are non-lustrous, brittle and poor conductors of heat and electricity (except graphite).
Detailed explanation-2: -Nonmetals are (usually) poor conductors of heat and electricity, and are not malleable or ductile; many of the elemental nonmetals are gases at room temperature, while others are liquids and others are solids. The metalloids are intermediate in their properties.
Detailed explanation-3: -A nonmetal is an element that is generally a poor conductor of heat and electricity. Most properties of nonmetals are the opposite of metals.
Detailed explanation-4: -Nonmetals have higher electronegativity than metals. First ionization energy of an element X is the energy needed to ionize it to X + ^+ +. Ions of metals are positive, they lose electrons rather easily. While nonmetals form negative ions, usually taking an electron.
Detailed explanation-5: -So, non-metals have high ionization enthalpy due to their small size and high electronegativity as compared to metal.