Q35 of 181 Page 304

What are the merits of the modern periodic table of elements ?

(i) The main advantage that it shows that why elements in a group show similar properties and elements in different groups show different properties.


(ii) The modern periodic table is based on the increasing order of their atomic number.


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35

For each of the following triads, name the element with the characteristic specified below.

 35

State one reason for keeping fluorine and chlorine in the same group of the periodic table.

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What is a group in the periodic table ? In which part of a group would you separately expect the elements to have (i) the greatest metallic character (ii) the largest atomic size?

 36

In what respects do the properties of group 1 elements differ from those of group 17 elements ? Explain with example by taking one element from each group.