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CBSE Class 10 Answered

name two elements of first period in modern periodic table
Asked by kavithasenthil148 | 06 Feb, 2021, 07:09: PM
Expert Answer
First period contains 2 elements and is called very short period. Hydrogen and Helium are the two elements placed in this period.
Answered by Ramandeep | 08 Feb, 2021, 01:11: PM
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