Question

Energy of 3rd orbit of boron

Answer 1

Answer:

So... for the element of BORON, you already know that the atomic number tells you the number of electrons. That means there are 5 electrons in an boron atom. Looking at the picture, you can see there are two electrons in shell one and three more in shell two.

Explanation:

The energy of electron in 3rd Bohr orbit is -2.43×10^-19 Joule

Answer 2

Answer:

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$\rm{E_n}$ =−13.6×(z²/n²)eV

$\rm{E_n}$ =−13.6×1/9eV

$\rm{E_n}$ = −1.5eV