Question

Two elements X and Y have atomic numbers 6 and 17 respectively. The

sum of their period numbers (X+Y) is​

Answer 1

Answer:

23

Explanation:

X = 6

y = 17

x + y = 17 + 6

x + y = 23

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Answer 2

6= carbon

17= clorine

6+17= 23 =vanadium