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The first ionizatioon enthalpy (DeltaH) ...

The first ionizatioon enthalpy `(DeltaH)` values of the third period elements , Na m Mg and Si are respectively 496 , 737 and 786 kJ/mol . Predict whether the first `DeltaH` value for AI will be more close to 575 or 760 kJ / mol. Justify your answer.

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To determine whether the first ionization enthalpy (ΔH) value for aluminum (Al) is closer to 575 kJ/mol or 760 kJ/mol, we can analyze the trend of ionization enthalpy in the third period elements: sodium (Na), magnesium (Mg), and silicon (Si). ### Step-by-Step Solution: 1. **List the Given Ionization Enthalpy Values:** - Sodium (Na): 496 kJ/mol - Magnesium (Mg): 737 kJ/mol - Silicon (Si): 786 kJ/mol ...
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