Question

(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 ?

Lakhmir Singh Chemistry Class 10

Answer 1

Ans e) Advantages
i It helps to study about elements in arranged manner
ii It helps in positioning the elements in respective groups

Answer 2

Answer:

Advantages of the periodic table:

i It has made the study of chemistry systematic and easy.

ii It is easier to remember the properties of an element if its position in the periodic table is known.

iii The type of compounds formed by an element can be predicted by knowing its position in the periodic table

.iv It is used as a teaching aid in chemistry in schools and colleges.

Explanation:

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