Electrons repel because they are charged and there is Coulomb repulsion between them.
This is not a phenomena that depends on quantum mechanics or the fact that they are moving in the same direction. Electrons repel when they are moving in any direction or not moving at all.
The quantum mechanical description of the time evolution of a two particle system will depend on the interaction between the two particles. It also depends on the spin and statistics of the particles. In this case they are two identical fermions with a Coulomb repulsion and unspecified spin. It has also not been specified whether the quantum state in question is an eigenstate of the Hamiltonian.
There is not much more to say other than one needs to be clear as to whether one is asking a question about the Hamiltonian or the wave function.
1) what is electron? 2) what is matter? 3) structure of atom?
Yes, electron clouds have a negative charge. The electrons make up electron clouds (naturally) and the electron carries a negative electrostatic charge. Since electrons carry a negative electrostatic charge, and, by a fundamental principle of electrostatics like charges repel each other, the electrons don't like each other. That's one of the guiding principles behind electron spin and the structure of electron orbitals in chemistry and biochemistry. The big fat positive charge on the nucleus captures the electrons, but the electrons have to decide amongst themselves how they're gonna get along out in the electron shells. And they do. Is it any wonder that electron shell structures rule most of chemistry?
Negative charges repel each other because they have like charges. In other words, the negative charges have an excess of electrons, which causes them to push away from each other due to their similar charge. This repulsion is governed by the principles of electromagnetic force.
Repel, because like charges repel each other
An electron plus an electron will repel each other due to their negative charges. This is because like charges repel each other according to the principles of electromagnetism.
they carry same charge thus repel as opposites attract each other
"Opposites attract". So two electrons repel each other.
1) what is electron? 2) what is matter? 3) structure of atom?
Electric charge is a property that causes subatomic particles such as protons and electrons to attract or repel each other. Particles with opposite charges (e.g. positive and negative) attract each other, while particles with the same charge (e.g. positive and positive) repel each other.
Each electron has a single negative charge. Objects with like charges repel each other. Therefore two electrons following parallel tracks will repel, not attract, each other.
Electrons have a negative charge, so they will repel away from one another. Electrons are attracted only to protons or other positive charges. if your question is whether,a negative charge attracts other, it is possible,if you place a charge of less magnitude near a charge of greater magnitude, one can attract other.this is due to the fact that, induction charges are set up in the lesser magnitude charge due to the greater magnitude charge.
Two electrons repel each other due to their negative charges.
Pairs of electrons will repel each other due to their negative charges.
Electrons have repelling properties due to their negative charge. Like charges repel each other, so electrons repel each other when they come close together. This repelling force is responsible for the stability of atoms and prevents electrons from collapsing into the nucleus.
They possess negative charges and in the universe anything having same charge would repel eachother.
Yes, electron clouds have a negative charge. The electrons make up electron clouds (naturally) and the electron carries a negative electrostatic charge. Since electrons carry a negative electrostatic charge, and, by a fundamental principle of electrostatics like charges repel each other, the electrons don't like each other. That's one of the guiding principles behind electron spin and the structure of electron orbitals in chemistry and biochemistry. The big fat positive charge on the nucleus captures the electrons, but the electrons have to decide amongst themselves how they're gonna get along out in the electron shells. And they do. Is it any wonder that electron shell structures rule most of chemistry?
Repel each other