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Classification of Modern Periodic Table

What is meant...

Question

What is meant by a group in the periodic table?

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Solution

In the periodic table, there are 18 vertical columns, referred to as groups. A group contains elements with same number of electrons in their outermost shell due to which they show similar properties.

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Q. (a) 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?
(b) In what respects do the properties of group 1 elements differ from those of group 17 elements? Explain with examples by taking one element from each group.
(c) From the standpoint of atomic structure, what determines which element will be the first and which the last in a period of the periodic table?
(d) Explain why, the properties of elements are repeated after 2, 8, 18 and 32 elements in the periodic table.
(e) What are the advantages of the periodic table?

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