Question

The energy associated with the first orbit of He⁺ is ____________ J.

विकल्प

• − 2.18 × 10⁻¹⁸

• − 0.54 × 10⁻¹⁸

• − 8.72 × 10⁻¹⁸

• − 4.69 × 10⁻¹⁸

Answer 1

The energy associated with the first orbit of He⁺ is − 8.72 × 10⁻¹⁸ J.

Explanation:

Energy of first orbit of He⁺:

E_n = `-2.18 xx 10^-18 (("Z"^2)/("n"^2)) "J"`

= `-2.18 xx 10^-18 (2^2/1^2)`

= − 8.72 × 10⁻¹⁸ J