Oxygen
1. Oxygen is a
chemical element
with the symbol "O"
and atomic number
8.
2. It is one of the
most abundant
,elements in the
Earth's crust,
making up about
21% of the Earth's
atmosphere.
3. Oxygen is a
diatomic molecule,
meaning it exists as
O2 in its natural
state.
,4. It was discovered
independently by
multiple scientists,
including Carl
Wilhelm Scheele and
Joseph Priestley, in
the late 18th
century.
5. Oxygen is
essential for all
, aerobic life on Earth.
6. The word
"oxygen" comes
from the Greek word
"oxygenes," which
means "acid-
forming," reflecting
its role in
combustion.