πΈπͺπ§ͺβοΈβοΈ
πΈπͺπ§ͺβ¨πποΈβ‘
πΈπͺπ¨βπ¬π‘
πΈπͺπ§ͺππ‘
πΈπͺπ§ͺποΈ
#berzelius #atomic weight #stoichiometry #swedish chemist