Yes, it exists. If you write the orbitals in order of increasing energy, then you get it.
The order is:-
1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p.....................
Here, you get the 3s orbital at the 4th place.
Maximum 2, TWO in any "s" orbital
The "s" can hold 2 electrons, the "p" can hold 6, the "d" can hold 10 and the "f" can hold 14.
The 2s orbital and 3s orbital both have the same spherical shape and can hold a maximum of two electrons of opposite spin. They only differ because the 3s orbital is further out from the nucleus than the 2s orbital, thus the 3s orbital has a higher energy value.
One electron in 3s orbital of sodium
All of 11 electrons in sodium are in different electron orbitals: 2 electrons are in 1s orbital, 2 in 2s, 6 in 2p and 1 in the 3s orbital. (This last one is the so-called valence electron)
Two per level (that is, 2 1s, 2 2s, 2 3s, etc.)
There are no unpaired electrons in calcium, all 20 electrons are in pairs, i.e. each pair is configured in one orbital: 2x in 1s orbital 2x in 2s orbital 2x in each of the three 2p orbitals 2x in 3s orbital 2x in each of the three 3p orbitals and 2x in 4s orbital (these two are the valence electrons)
The are two electrons in the 3s orbital of magnesium (Mg.)
The 2s orbital and 3s orbital both have the same spherical shape and can hold a maximum of two electrons of opposite spin. They only differ because the 3s orbital is further out from the nucleus than the 2s orbital, thus the 3s orbital has a higher energy value.
The 2 electrons from 3s orbital.
True
One electron in 3s orbital of sodium
All of 11 electrons in sodium are in different electron orbitals: 2 electrons are in 1s orbital, 2 in 2s, 6 in 2p and 1 in the 3s orbital. (This last one is the so-called valence electron)
3s: 2 3p: 6 3d: 10 Orbital chart 1s 2sp 3spd 4spdf 5spdf 6df 7df
Two per level (that is, 2 1s, 2 2s, 2 3s, etc.)
The max. number of electrons that can fill the 3s orbital is 2.
There are no unpaired electrons in calcium, all 20 electrons are in pairs, i.e. each pair is configured in one orbital: 2x in 1s orbital 2x in 2s orbital 2x in each of the three 2p orbitals 2x in 3s orbital 2x in each of the three 3p orbitals and 2x in 4s orbital (these two are the valence electrons)
A chromium ion has the atomic number 24. This means that a neutral atom has 24 electrons. Because it has the net charge of positive three, it has 21 electrons.
In silver there are 2 electrons in 3s orbital, 6 electrons in 3p orbitals and 10 electrons in 3d orbitals. So there is a total of 18 electrons