Frequently Asked Questions about Oxygen
What is the atomic number of oxygen?
Oxygen has an atomic number of 8, meaning each atom contains 8 protons in its nucleus.
What is the atomic mass of oxygen?
The standard atomic weight of oxygen is 15.999 u (unified atomic mass units).
What category does oxygen belong to?
Oxygen is classified as a reactive nonmetal.
What is the state of oxygen at room temperature?
Oxygen is a gas at 20 °C (68 °F).
What is the melting point of oxygen?
The melting point of oxygen is -218.79 °C / 54.36 K.
What is the boiling point of oxygen?
The boiling point of oxygen is -182.96 °C / 90.19 K.
What is the density of oxygen?
The density of oxygen is 1.31e-3 g/cm³ (20°C).
What is the electronegativity of oxygen?
Oxygen has a Pauling electronegativity of 3.44.
What is the electron configuration of oxygen?
The electron configuration of oxygen is [He] 2s2 2p4.
What are the common oxidation states of oxygen?
Oxygen commonly exhibits the following oxidation states: −2.
When was oxygen discovered?
Oxygen was discovered in 1774 by Joseph Priestley; Carl Wilhelm Scheele.
Is oxygen radioactive?
Oxygen is a stable element with no naturally occurring radioactive isotopes.
What is the biological role of oxygen?
Essential for aerobic respiration in most complex organisms.
What are the common uses of oxygen?
Oxygen is used for: Medical oxygen; Steelmaking; Water treatment; Rocket oxidizers.
