Why do electrons have orbital angular momentum?

In an atom the attractive force which contains the electron is the electrostatic force of attraction between the nucleus and the electron, directed along the radius r at right angles to the direction of the electron’s motion. The angular momentum vector →L is directed along the axis of rotation.

Why do electrons move in fixed orbits?

Why does the electron have to move around the Nucleus? This switch in energy (orbit) levels occurs when the electron gains or loses energy through the absorption or emission of a photon (which is a light particle with a certain amount of energy, also called a quantum of energy).

How can an electron have no angular momentum?

Quantum mechanically, the electron in the ground state (n=1) is not orbiting the nucleus; such an electron has zero angular momentum and its energy is less than that of any electron having non-zero angular momentum. There are example where the ground state is different from zero.

What is spin angular momentum of electron?

Spin is intrinsic angular momentum associated with elementary particles. The spin angular momentum of an electron, measured along any particular direction, can only take on the values ħ/2 or -ħ/2. We denote the spin of a particle by S and its component along the z-axis by Sz.

Are electrons in fixed orbits?

Explanation: The electrons do exist in fixed orbits BUT when the electrons are excited, they will move up an energy level. Once the energy used to excite the electron is released, the electron moves downwards back to its initial energy level.

What determines the angular momentum of the electron in its orbital motion around the nucleus?

The quantum number ml refers, loosely, to the direction of the angular momentum vector. The magnetic quantum number determines the energy shift of an atomic orbital due to an external magnetic field (this is called the Zeeman effect) – hence the name magnetic quantum number.

Which Cannot be correct value of angular momentum of an electron in an orbit?

l = mvr = nh/2π i.e., the integral multiple of h/2π so that n = 1,2,3,4 etc. So, the answer is C) 2.5 h/2π as, it can not be possible.