Compare atomic radii of the third-period elements while moving from left to right:

N a > M g > A l > S i > P > S > C l >> A r

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N a < M g < A l < S i < P < S = C l << A r

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N a < M g < A l < S i < P

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none of these

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Solution

The correct option is A $N a > M g > A l > S i > P > S > C l >> A r$
The radii generally decrease along each period of the table, from the alkali metals to the noble gases as charge density increases.
The correct order is $N a > M g > A l > S i > P > S > C l >> A r$

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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

Which of the following elements have similar properties?

F, N a, M g, A l, S i, P, S, C l, A r

K

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

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Compare atomic radii of the third-period elements while moving from left to right:

The correct option is A Na>Mg>Al>Si>P>S>Cl>>ArThe radii generally decrease along each period of the table, from the alkali metals to the noble gases as charge density increases.The correct order is Na>Mg>Al>Si>P>S>Cl>>Ar

The correct option is A $N a > M g > A l > S i > P > S > C l >> A r$
The radii generally decrease along each period of the table, from the alkali metals to the noble gases as charge density increases.
The correct order is $N a > M g > A l > S i > P > S > C l >> A r$