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

Open in App

Solution

Option (b) is correct.
Metallic character decreases across a period as the number of valence electrons increases. Metals readily lose electrons and nonmetals readily gain electrons to attain the nearest noble gas electronic configuration. All the given elements belong to period 3.
Na has only 1 valence electron hence it will lose it most easily and it is the most metallic element. Mg has 2, Al has 3, Si has 4 and Cl has 7 valence electrons respectively. So there is a decrease in the metallic character from Na to Cl.

Suggest Corrections

Similar questions

Arrange the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, Al

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

$N a^{+} . M g^{2 +}, A l^{3 +}$ and $S i^{4 +}$ are isoelectronic. The order of their ionic size is

N a^{+}

M g^{2 +}

A l^{3 +}

and

S i^{4 +}

are isoelectronic, their ionic size will follow the order:

Q. The first ionisation energies of six

3^{r d}

period elements are 496, 578, 738, 789, 1000 and 1012

{kJ mol}^{- 1}

. The elements to which these energies correspond respectively are:

Join BYJU'S Learning Program

Explore more

Metals

Standard IX Chemistry

Join BYJU'S Learning Program

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

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