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Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?

 
Periodic Classification Of Elements
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12/11/2020 12:22 pm
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romiroy12
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Which of the given elements A, B, C, D and E with atomic number 2, 3, 7, 10 and 30 respectively belong to the same period?

(a) A, B, C

(b) B, C, D

(c) A, D, E

(d) B, D, E

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class 10 cbse ncert exemplar periodic classification elements
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12/11/2020 12:22 pm
Anonymous 
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(b) B, C, D

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Topic Tags:  class 10 (8819) , cbse (15084) , ncert exemplar (1417) , periodic classification (299) , elements (299) ,
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