An atom of this element has shells and valence electrons.
(the element is hydrogen.)...
Answers: 1
Chemistry, 23.06.2019 12:30, marleacorey
All chemicals, even safe chemicals, such as sodium chloride( table salt), are toxic if exposure is high enough. (true or false)
Answers: 2
Mathematics, 22.07.2020 14:01
Mathematics, 22.07.2020 14:01
Mathematics, 22.07.2020 14:01