Q26 of 52 Page 38

Which of the following set of elements is written in order of their increasing metallic character?

As we move down in a group the metallic nature of elements increases. Be Mg Ca are present in the same group (group 2 of modern periodic table). Thus, Ca has the highest metallic character.

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24

Which one of the following does not increase while moving down the group of the periodic table?

 25

On moving from left to right in a period in the periodic table, the size of the atom.

 27

The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. What is such an arrangement of elements called as? Give one example of such a set of elements.

 28

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


(a) Pick two sets of elements which have similar properties.


(b) The given sequence represents which law of classification of elements?