Question

Which of the following atoms would you expect to release less energy than carbon when an electron is added to its valence?

chlorine (Cl)

neon (Ne)

fluorine (F)

oxygen (O)

Answer 1

@Somy

Answer 2

@matt101 im sleepy~ so im not getting the question

Answer 3

More will be the electron gain enthalpy more will be the energy released.

Answer 4

Here Neon is a noble gas. It's already in a stable configuration so it will require energy for any further addition of electron.

Answer 5

neon?

Answer 6

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Answer 7

When you add an electron to an atom, the amount of energy released depends on how stable that atom was beforehand. The less stable it is, the more energy is released. We know atoms are most stable when they have a full octet in their valence shell.

Oxygen has 6 valence electrons. It needs 2 more electrons to make a full octet, so its pretty energetically favourable for it to accept another electron. A lot of energy would be released if this were to occur.

Chlorine and fluorine both have 7 valence electrons. Better than oxygen, but still a lot of energy will be released when an electron is added.

Neon already has a full octet. In fact, it's so stable its practically unreactive (that's why it's called an inert gas)! This means adding another electron wouldn't do much to improve its stability (if anything, the stability would decrease), and so neon is your answer!

Answer 8

thank you matt!!!!

Answer 9

thank you everybody else too!!!!