Chemistry, asked by ayushisingh1554, 8 months ago

how many periods are called long periods ? How many elements are in a long period?

Answers

Answered by battuadityarao

1

Answer:

Explanation:

There are currently seven complete periods in the periodic table, comprising the 118 known elements.

...

Period 1.

Group 1 18

Atomic # Name 1 H 2 He

a)2

b)64

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