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Please explain the arrangement of the periodic table of elements and the meaning of some symbols above.
This table is arranged according to the arrangement law of the electron layers around the atoms of each element. When reading this watch, don't simply look from the inside out in the order of concentric circles, but look in the order of thin lines.

In this target-like table, the gray "bull's-eye" refers to the electron orbit of 1s, that is,1s. This orbit can arrange two electrons at most, one is H and the other is He.

The next layer, 2sp, refers to the 2s and 2p orbits of the second layer of electrons outside the nucleus. These two orbits can emit at most 2×( 1+3)=8 electrons, which is the maximum number of electrons emitted by the second layer. When lithium (Li, 3) rotates counterclockwise to Neon (ne, 10), eight elements with 1~~8 electrons are discharged in the second layer respectively.

The third floor is exactly the same as the second floor. 3sp is the 3s and 3p orbitals on the third electron layer, which can release 8 electrons in total, that is, from sodium (Na, 1 1) to argon (Ar, 18, but the symbol in this table is a).

Argon should be followed by K, that is, in the ring of 4sp separated by a layer, which has been connected by thin lines on the way. Therefore, 4sp represents 4s and 4p orbits of electrons in the fourth layer. Although the 3d orbit in the third layer is still unfilled, due to the staggered energy levels (energy 3d > 4s), electrons are filled with 3p, followed by 4s instead of 3d. 4s Can also be filled with two electrons, that is, potassium (k, 19) turns to calcium (ca, 20) counterclockwise;

After calcium, scandium (Sc, 2 1) inexplicably joined and went to the 3d layer. Because it's time to fill in the 3d layer after filling in the 4s layer, it jumps to the 3d layer ... This is probably the law behind it, but this table is actually useless, and this content is actually more difficult.