Based on equation E = -2.178 10^ -18 J ( Z^2 n^2 ), certain conclusions are written. Which of them is not correct ?

NEET 2013 Chemistry question

Chemistry Structure of Atom NEET 2013

Based on equation , certain conclusions are written. Which of them is not correct ?

(1)The negative sign in equation simply means that the energy of electron bound to the nucleus is lower than it would be if the electrons were at the infinite distance from the nucleus.
(2)Larger the value of , the larger is the orbit radius.
(3)Equation can be used to calculate the change in energy when the electron changes orbit.
(4)For , the electron has a more negative energy than it does for which means that the electron is more loosely bound in the smallest allowed orbit.Correct

Answer: (4)

Solution

The expression is the Bohr energy of the electron in a hydrogen-like species. (1) is correct: the zero of energy is the electron at infinite separation, and a bound electron has lower (negative) energy. (2) is correct: . (3) is correct: E_fE_i$ =

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Question ID VK-091346