What is the energy of an electron in the hydrogen atom in the 2nd energy orbital?

Electrons in a hydrogen atom must be in one of the allowed energy levels. If an electron is in the first energy level, it must have exactly -13.6 eV of energy. If it is in the second energy level, it must have -3.4 eV of energy. An electron in a hydrogen atom cannot have -9 eV, -8 eV or any other value in between.

What will be the velocity of an electron revolving in second orbit of hydrogen atom?

94×106 ms−1.

How do you calculate the energy of a hydrogen atom?

A simple expression for the energy of an electron in the hydrogen atom is:

1. E=−13.6n2 where the energy is in electron volts.
2. n is the principle quantum number.
3. So for an electron in n=1 :
4. E=−13.6eV.
5. To convert to joules you can x this by 1.6×10−19.

How do you find the energy level of an electron?

Number of energy levels in each period

1. The atoms in the first period have electrons in 1 energy level.
2. The atoms in the second period have electrons in 2 energy levels.
3. The atoms in the third period have electrons in 3 energy levels.
4. The atoms in the fourth period have electrons in 4 energy levels.

What is the energy of 2nd orbit of He+ ion?

Answer : The energy and radius of second orbit of ion are, -13.6 ev and 105.8 pm respectively.

What would be the energy of an electron in 2nd orbit of He atom?

The energy of the second Bohr orbit of hydrogen atom is – 3.41 eV.

What is the velocity of electron in 2nd orbit?

2×108cms−1.

What is the velocity of an electron in second orbit of helium?

18×106 m/sec.

How do you calculate energy of electron?

Question-5) Energy of an electron is given by E = -2.178 x 10-18 (Z2/n2) J.

What are the energies of electrons in the Bohr’s orbits of hydrogen?

The energies of electrons in the Bohr’s orbits of hydrogen atom expressed in eV are: Orbit Energy 1 -13.6/1 2 = -13.6 eV 2 -13.6/2 2 = -3.4 eV 3 -13.6/3 2 = -1.51 eV 4 -13.6/4 2 = -0.85 eV

How do you calculate the radius of Bohr’s orbit?

Radius of Bohr’s orbit in hydrogen and hydrogen like species can be calculated by using the following formula. n = prinicipal quantum number of orbit. Now compare the n 2 /Z values of orbits for given species with that of hydrogen’s first orbit to get the answer.

What is the ratio of the radii of first three orbits?

Hence the radius of n th orbit, r n = 0.529n 2 Å. For first three orbits, n values are 1,2 and 3. The ratio of radii of first three orbits = r 1 : r 2 : r 3 = n 12 : n 22 : n 32 = 1 2 : 2 2 : 3 2 = 1 : 4 : 9 1) What is the ratio of the radii of first orbits of H, He + and Li 2+?

How do you calculate the total energy of an electron?

Total Energy of electron, E total = Potential energy (PE) + Kinetic energy (KE) For an electron revolving in a circular orbit of radius, r around a nucleus with Z positive charge, E total = (-Ze 2 /r) + (Ze 2 /2r) = -Ze 2 /2r