define ionization enthalpy. how does it vary along the group and period?
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ionisation energy is qualitatively defined as the minimum amount of energy required to remove the loosely held electron, the valence electron of an isolated gaseous atom to form a cation
As move from left to right ionisation energy increase gradually.
As we go down the group ionisation energy decreases gradually
As move from left to right ionisation energy increase gradually.
As we go down the group ionisation energy decreases gradually
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Ionization enthalpy
Explanation:
- The energy required to separate the most loosely bound electron from an atom with an isolated gaseous state atom is called ionization energy (IE) or 'ionization potential' or 'ionization enthalpy'. It is expressed in electron volts (eV), or 'joules per mole'.
- The first ionization energy is a recurring property. The value of the first ionization energy increases when moving from left to right in a period of the periodic table.
- When descending from top to bottom in the same group, the value of ionization energy is low. This property is particularly visible in the main blocks.
Learn more: Ionization
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