Which of the following elements have similar properties?

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

F and Cl

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Na and Al

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Si and Ar

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P and K

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Solution

The correct option is C F and Cl
As we move from top to bottom in a group atomic properties go in a regular manner like electron affinity, ionization potential and so on.

We can say that the elements present in the same group have similar properties.
Hence, fluorine and chlorine are in the same group, they will have similar properties.

Hence the correct option is A.

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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

Elements have been arranged in the following sequence on the basis of their increasing atomic masses. F, Na, Mg, Al, Si, P, S, Cl, Ar, K
[2 MARKS]
(a) Pick two sets of elements which have similar properties.
(b) The given sequence represents which law of classification of elements?

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

The given sequence of elements arranged based on increasing atomic masses represents which law of classification of elements?

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

K

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Which of the following elements have similar properties? F,Na,Mg,Al,Si,P,S,Cl,Ar & K

Which of the following elements have similar properties?

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