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one is spin up one is spin down, there are no other possibilities.

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2 electrons can occupy the same orbital only if?

they have opposite spin


Maximum number of electrons in the 5s orbital?

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.


Why can there be on more than two electrons in an orbital?

For electrons to be in the same orbital, they must have different spoins, or else they cancel each other out. Since this is the case, there can only be 2 different directions in which electrons can spin. So there can be either 1 or 2 electrons in each orbital.


How many ways are there to arrange 2 electrons in p-orbital and d-orbital?

In any one orbital there is only one way to arrange the two electrons and that is with opposite spin. (Paulis exlusion principle) In the 3 different p orbitals you could arrange 2 electrons without spin pairing in the same orbital in 3 ways, The middle two are the same. The same applies to d orbitals


What is the maximum number of electrons that an atomic orbital can hold?

An orbital can have a maximum of two electrons that have different sets of the four quantum numbers (n, l, ml, ms).


Electrons can occupy the same orbital if an only if they have opposite?

Spin


How many electrons can occupy the 4f orbital?

ten. because a d subshell corresponds to an l value of 2, m_l can be -2,-1,0,1,2. so that's 5 orbitals, and 2 electrons can fit into each one (one with a +1/2 spin and one with a -1/2 spin) so that's 10 electrons total.


Two electrons in the same orbital must have opposite spins is a statement of the?

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).


Is it true or false an orbital diagram uses arrows to represent the spin of the electrons?

An orbital is a region of space that an electron can exist in. For the diagram you start with the 1 s orbital and then 2s, 2p, and so on. Each orbital can hold 2 electrons and each arrow represents, as shown in this image. http://www.chem.uky.edu/courses/che105/105208p6.gif


How many total electrons can the d orbitals hold?

The d orbitals can hold a total of 10 electrons. Each d orbital can hold a maximum of 2 electrons: one with spin up and one with spin down.


What must be true about electrons sharing the same atomic orbital?

The Pauli exclusion principle would require that an electron sharing the same orbital would have to have opposite spin from the other particle in the pair. They therefore have different spin quantum numbers of +(1/2) and -(1/2)


How many electrons fill each orbital?

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