Question

choose correct option

Answer 1

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the correct answer is 1 + 2 + 3..................(x - 1).

Because,An atom has x energy level then total number of lines in its spectrum are 1 + 2 + 3..................(x - 1).

An atom has x energy level then total number of lines in its spectrum are 1 + 2 + 3..................(x - 1).For example:

An atom has x energy level then total number of lines in its spectrum are 1 + 2 + 3..................(x - 1).For example:When an atom has 5 energy levels, the total number of lines in its spectrum will be 1+2+3+4=10.

Answer 2

Answer:

Here's ur Answer Mate:-

Option (c) 1 + 2 + 3..(x - 1).

Hope it helps uh!