Spin
they have opposite spin
No. Electrons are fermions, meaning they cannot share the same set of four quantum numbers. Usually when we say "orbital" we only mean the first three, so there is room for two electrons in an orbital (corresponding to the two possible ms values).
only if spins are opposite: one up one down.
The maximum number of electrons that can occupy the 5s orbital is 2. This is based on the Pauli exclusion principle, which states that each orbital can hold a maximum of two electrons with opposite spins.
All other orbitals at the sub contain at least one electron
There can only be 2 electrons in each single orbital, and they will be on opposite sides of the electron cloud (orbital).
An orbital can only occupy maximum of 2 electrons. As p orbital consist of 3 orbitals. And has 3 orientations. Px, Py, Pz. So as there are 3 orbitals so p orbital can occupy at the maximum 6 electrons regardless of principle quantum no.. In 4p 4 is principle quantum no. So it represent 4p represent the p orbital of 4th shell. So it also occupy at the maximum of 6 electrons.
In any shell excluding shell1, there is only 1 s orbital and 1 p orbital. Subshells and the Orbitals are same. Orbital g is known as subshell 5. g orbital is present shell 6. But till today no element is discovered with an electron in g orbital.
Electrons have spin of a 1/2. These make electrons fermions. According to Pauli's exclusion principle, no more than one fermion can have the same spin in the same space. So, the electrons occupying the same space must have opposite spin (and so, only two electrons can occupy the same orbital as a result of this, as three electrons will results in two electrons having the same spin state).
The statement you are referring to is known as the Pauli exclusion principle, which was formulated by physicist Wolfgang Pauli. This principle states that no two electrons in an atom can have the same set of quantum numbers, meaning no more than two electrons can occupy a single orbital with opposite spins.
2. The five d orbitals can hold ten in total.
s-orbital = 2e- (s) orbital can hold 2 electrons, each with opposite spin. p-orbital = 6e- (p) orbital can hold 6 electrons in 3 suborbitals, so 2 electrons in each d-orbital = 10e- (d) orbital can hold 10 electrons in 5 suborbitals, so 2 electrons in each f-orbital = 14e- (f) orbital can hold 14 electrons in 7 suborbitals, so 2 electrons in each