Question

VSA [Marks-1]
A. Tick the correct answer.
1. 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
​

Answer 1

Answer:

C) A,D,E

Explanation:

this question not want explaination

Answer 2

Answer:(b)

Explanation:

in the first period only two elements r thr with atomic no. 1 and 2

in the second period there are 8 elements frm atomic no. 3 to 10

so,this includes elements with atomic no. 3,7 and 10

hope this helps you....thank you!!!