Question

write the no.of periods and groups in modern periodic table.how does the mettalic characters vary on moving 1]from left to right in a period,2} down a group?give reason to justify your answer

Answer 1

Answer:

7period and 18groups

1)matallic charater decreses

2)metallic character decreses.

Explanation:

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Answer 2

Heya!

The answer for your question is:

Number of periods in Modern Periodic Table are 7 while number of groups in Modern Periodic Table are 18.

1) While moving from left to right, the metallic characters of a atom decreases.

2)While moving down the group, the affective nuclear charge experienced by valence electrons gets decreased,

hence metallic character also decreases down the group.

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