Which pair is different from the others?
Li – Mg
B – Si
Be – Al
Li – Na
The first ionistation enthalpies of Na, Mg, Al, and Si are in the order (a) Na< Mg > Al < Si (b) Na> Mg > Al > Si (c) Na< Mg< Al< Si (d) Na> Mg> Al < Si
Which of the following set of elements is written correctly in the order of their increasing metallic character?
(a) Mg, Al, Si (b) C, O, N (c) Na, Li, K (d) Be, Mg, Ca
Question 17 Arrange the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, Al (a) Cl > Si >Al > Mg >Na (b) Na >Mg >Al >Si > Cl (c) Na > Al > Mg > Cl > Si (d) Al > Na> Si > Ca> Mg
Na+.Mg2+,Al3+ and Si4+ are isoelectronic. The order of their ionic size is