Question

Problem 2.6
The first ionization enthalpy (A, H) values
of the third period elements, Na, Mg and
Si are respectively 496, 737 and 786 kJ
mol-!. Predict whether the first A H value
for Al will be more close to 575 or 760 kJ
mol- ? Justify your answer.​

Answer 1

${\huge{\underline{\underline{\mathcal{\red{♡ANSWER♡}}}}}}$

• ⭐It will be more close to ${575kJmol^-1}$.
• ⭐The value for$\red{\tt{AI}}$ should be lower than of $\purple{\tt{Mg}}$because of effective shielding of$\orange{\tt{3p}}$ electrons from the nucleus by $\green{\tt{3s-}}$ electrons.