Question

How many groups and periods are there in the modern periodic table? How do the atomic size and metallic character of elements vary as we move :; (i) down a group and (ii) from left to right in a period?(Delhi - 2015)

Answer 1

Answer:

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Answer 2

Groups and periods in the modern periodic table

• The periodic table is composed of 7 periods and 18 groups as shown in the image 1 attached.
• The atomic size of the elements increases down the groups and decreases from left to right in a period as shown in the second attachment.
• On the other hand, the metallic character of the elements increases down the group and decreases from left to right in a period as shown in the third attachment.

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