Question

An element "X" has mass number 35 and the number of neutrons is 18. Identify the
group number and period of "X".​

Answer 1

Explanation:

Given: mass of number of X = 35

No. of neutrons = 18

Atomic number of element X = Mass number - no. of neutrons present

Atomic no. = 35-18 = 17

The electronic configuration of X will be 2, 8,7

X will belong to group no. 10 +7= 17th

X will belong to period no 3

Answer 2

Answer:

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