(i) Electronegativity: This is a dimensionless quantity, meaning it has no unit. It is a measure of the ability of an atom to attract a bonding pair of electrons.

(ii) Electron gain enthalpy: This has a unit. It is usually measured in kilojoules per mole (kJ/mol). It is the energy change that occurs when an electron is added to a neutral atom to form a negative ion.

(iii) Ionisation enthalpy: This also has a unit. It is also usually measured in kilojoules per mole (kJ/mol). It is the energy required to remove an electron from a gaseous atom or ion.

(iv) Metallic character: This is a qualitative term and does not have a unit. It refers to the level of reactivity of a metal. Metals tend to lose electrons in chemical reactions, as opposed to gaining them.

Question

(i) Electronegativity: This is a dimensionless quantity, meaning it has no unit. It is a measure of the ability of an atom to attract a bonding pair of electrons.

(ii) Electron gain enthalpy: This has a unit. It is usually measured in kilojoules per mole (kJ/mol). It is the energy change that occurs when an electron is added to a neutral atom to form a negative ion.

(iii) Ionisation enthalpy: This also has a unit. It is also usually measured in kilojoules per mole (kJ/mol). It is the energy required to remove an electron from a gaseous atom or ion.

(iv) Metallic character: This is a qualitative term and does not have a unit. It refers to the level of reactivity of a metal. Metals tend to lose electrons in chemical reactions, as opposed to gaining them.

Knowee AI · Accepted Answer

(i) Electronegativity: This is a dimensionless quantity, meaning it has no unit. It is a measure of the ability of an atom to attract a bonding pair of electrons.

(ii) Electron gain enthalpy: This has a unit. It is usually measured in kilojoules per mole (kJ/mol). It is the energy change that occurs when an electron is added to a neutral atom to form a negative ion.

(iii) Ionisation enthalpy: This also has a unit. It is also usually measured in kilojoules per mole (kJ/mol). It is the energy required to remove an electron from a gaseous atom or ion.

(iv) Metallic character: This is a qualitative term and does not have a unit. It refers to the level of reactivity of a metal. Metals tend to lose electrons in chemical reactions, as opposed to gaining them.

Which of the following have no unit?(i) Electronegativity(ii) Electron gain enthalpy(iii) Ionisation enthalpy(iv) Metallic character

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