Which one of the following has the maximum metallic character?

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Solution

The correct option is A
Na

Across a period (from left to right), metallic character decreases. Na is the first element in $3^{r d}$ period. So, Na has maximum metallic character.

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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

Q. Arrange the following elements in the order of their decreasing metallic character.

Na, Si, Cl, Mg, Al

Q. 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

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, their ionic size will follow the order:

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Which one of the following has the maximum metallic character?

The correct option is A Na Across a period (from left to right), metallic character decreases. Na is the first element in 3rd period. So, Na has maximum metallic character.

The correct option is A
Na

Across a period (from left to right), metallic character decreases. Na is the first element in $3^{r d}$ period. So, Na has maximum metallic character.