Mendeleyev jadvali
Islam xoshimov
Professional Mentor
5712.12.2025
To acquaint students with the structure and laws of the periodic system developed by Dmitriy Ivanovich Mendeleyev, a talented chemist.
chemical elementsgreat russian scientistperiodic lawatomic weight
To'liq kirish imkoniyati
Bir martalik to'lov · Umrbod kirish