In modern periodic table, arrange the third row elements Na, Mg, AI and Si in the increasing order of their atomic size.

Na > Mg > Al > Si

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Al > Si > Na > Mg

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Si > Al > Mg > Na

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Na > Al > Si > Mg

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Solution

The correct option is A Na > Mg > Al > Si
On moving left to right in a period atomic size decreases due to higher attraction. Thus the increasing order of atomic size for given elements is Na > Mg > AI > Si.

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Similar questions

Q. In the modern periodic table, arrange the third-row elements

N a, M g, A l

and

S i

in the increasing order of their atomic size.

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

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:

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In modern periodic table, arrange the third row elements Na, Mg, AI and Si in the increasing order of their atomic size.

The correct option is A Na > Mg > Al > SiOn moving left to right in a period atomic size decreases due to higher attraction. Thus the increasing order of atomic size for given elements is Na > Mg > AI > Si.

The correct option is A Na > Mg > Al > Si
On moving left to right in a period atomic size decreases due to higher attraction. Thus the increasing order of atomic size for given elements is Na > Mg > AI > Si.