It surrounds us but we cannot see it – Nitrogen
Nitrogen comprises 78% of the air and is indispensable for living organisms.
Хими
7 – 10-р анги
Бичсэн: Vámos-Poljak Zsolt
Хянан шалгагч: Horváthné Kunstár Andrea
mozaLink
/Веб холбоос
Nitrogen comprises 78% of the air and is indispensable for living organisms.
Хими
7 – 10-р анги
Бичсэн: Vámos-Poljak Zsolt
Хянан шалгагч: Horváthné Kunstár Andrea
mozaLink
/Веб холбоос