everyday science MCQ #48847

Which period includes the elements from potassium K through krypton Kr in the standard long-form table?

everyday science MCQ #48847

  1. Question 1

    Q1. Which period includes the elements from potassium K through krypton Kr in the standard long-form table?

    • A) Period 3
    • B) Period 4
    • C) Period 5
    • D) Period 6

    Answer: Period 4

    Explanation: Period 4 begins with potassium (K, Z=19) and ends with krypton (Kr, Z=36), spanning 18 elements and including the first row of d-block transition metals.