Oxygen comes from plants as the undergo photosynthesis. In photosynthesis they absorb water and basically split it and O2 in the water is released by the plants through the stomata. Oxygen also just exists in our atmosphere.
5
Liquid density at boiling point (90 K) is 1.141 g·cm−3
the atomic weight is 15.9994
Oxygen is in the second period.
3
2-
it has no oder .
Oxygen is in p block. it is a useful gas. oxygens atomic number is 8.
O2
Colourless gas
a gas
5
Liquid density at boiling point (90 K) is 1.141 g·cm−3
One.
There are 3 oxygens
2
hydrogen and 2 oxygens