Characteristics of chemical element number 15.
| December 21, 2020 | education
Element number 15 in PSKhE is phosphorus.
It is in the fifth group, in the A subgroup.
Is in the third period.
There are 5 electrons on the outer electron layer.
Lowest oxidation state (-3).
Highest oxidation state (+5).
Non-metal
Examples of phosphorus compounds: PCl3, H3PO4
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