[CBSE AIPMT 2013] Based on equation E = −2.178 × 10⁻¹⁸ J × Z²/n², which of the following is NOT correct?
0.For n=1, the electron has more negative energy than n=6, meaning it is more loosely bound in the smallest orbit.
1.The negative sign means the energy of a bound electron is lower than that of a free electron at infinity.
2.Larger the value of n, the larger is the orbit radius.
3.The equation can be used to calculate energy change when the electron changes orbit.
Explanation
More negative energy at n=1 means the electron is MORE STRONGLY bound (not loosely bound) in the smallest orbit. Option A incorrectly states 'more loosely bound'.