Multiple choice

To which period does an element with atomic number 13 belong?

  1. Second period

  2. Third period

  3. Fourth period

  4. Fifth period
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Atomic number - 13 [2, 8, 3] There are three shells, which correspond to the third period. So, the element will lie in the third period.

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