engineering physics MCQ #479

The velocity of the electron in the ground state of hydrogen atom is 2.2 × 10⁶ m/s. What is the velocity of the electron in the ground state of Li²⁺?

engineering physics MCQ #479

  1. Question 1

    Q1. The velocity of the electron in the ground state of hydrogen atom is 2.2 × 10⁶ m/s. What is the velocity of the electron in the ground state of Li²⁺?

    • A) 2.2 × 10⁶ m/s
    • B) 4.4 × 10⁶ m/s
    • C) 6.6 × 10⁶ m/s
    • D) 1.1 × 10⁷ m/s

    Answer: 6.6 × 10⁶ m/s

    Explanation: The velocity is proportional to Z. For Li²⁺, Z = 3, so velocity = 2.2 × 10⁶ × 3 = 6.6 × 10⁶ m/s.