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Coatless · Answer 1 · 2021-07-10T01:41:24+0000

A period in a periodic table are the atomic numbers that increase from left to right..The periods are numbered from 1 to 7 on the left-handed side of the table.

Philia Fan · Answer 2 · 2021-07-11T03:27:26+0000

Answer:

In chemical bonding: Arrangement of the elements. The horizontal rows of the periodic table are called periods. Each period corresponds to the successive occupation of the orbitals in a valence shell of the atom, with the long periods corresponding to the occupation of the orbitals of a d subshell.

Step-by-step explanation:

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