'Air consists of 78% nitrogen, 21% oxygen & about 1% this noble gas'
argon
“A” IN SCIENCE: Air consists of 78% nitrogen, 21% oxygen & about 1% this noble gas
Air consists of 78% nitrogen, 21% oxygen & about 1% this noble gas
Air consists of 78% nitrogen, 21% oxygen & about 1% this noble gas
“A” IN SCIENCE
argon
“A” IN SCIENCE