Question

What does the symbol "E3" represent? ...?

Answer 1

The symbol "E3" represents the energy of electrons in the third energy level.


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Answer 2

Answer:

E₃ = energy in third energy level.

Explanation:

The energy of an electron is third orbit is given by :

$E=-\dfrac{13.6Z^2}{n^2}$

Where

Z is the atomic number

n is principal quantum number and n = 1,2,3....

i.e. the energy of an electron is inversely proportional to the principal quantum number.

E₁,E₂,E₃.......... shows the energy of an electron in first, second and third energy level respectively.