Helium and Chlorine have atomic numbers 2 and 17 respectively.Their valencies will be respectively.
Answers
Answered by
1
Answer:
zero and one
Explanation:
Helium has completely filled S orbital in 1s2 configuration and chlorine has ( Ne) 3s23p5
Answered by
1
Explanation:
the valancy of helium is 0 because it is 8th group element and it has duplet confrigation
the valancy of chlorine is 1 because it is seventh group element and it is electro negativity element
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