Elements
8

O

Oxygen

Oxygen (O) exists as a colourless, odourless gas in the earth’s atmosphere. Comprising 21% of the earth atmosphere it is vital for life on earth. It has the atomic number 8 in the periodic table and belongs in Group 16. It is a non metal with the symbol O.

Oxygen makes up 21% of the atmosphere and is vital to life on earth. It is the most abundant element on Earth and fifth most abundant in the universe. The presence of Oxygen is due to the process of photosynthesis from plants. This is an important process as most living organisms on earth rely on Oxygen for respiration and the creation of energy in living cells. In commercial uses Oxygen is used in hospitals and by divers and has industrial uses such as welding and oxidation of metals. Oxygen also exists as the allotrope Ozone that has the formula O3. Ozone is in the upper atmosphere and is responsible for protecting the earth from harmful UV rays. It is located in Group 16. It is a non metal gas at room temperature and it has a melting point of -218°c and a boiling point of -183°c. Oxygen was discovered by Carl Wilhelm Scheele, a Swedish pharmacist producing it from Mercuric oxide using Nitrates.

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FAQ's

What is the Melting Point for Oxygen?

Oxygen has a Melting Point of -218.4°F, meaning at -218.4°F it will turn to a liquid.

What is the Boiling Point for Oxygen?

Oxygen has a Boiling Point of -183°F, meaning at -183°F it will turn to a Gas.

What is the Electronegativity of Oxygen?

Oxygen's Electronegativty is 3.44. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Oxygen?

Oxygen has a Heat of Vaporization of 3.4099 kJ/mol.

Uses

Used in steel making, welding, and supporting life. Naturally occuring ozone (O3) in the upper atmosphere shields the earth from ultraviolet radiation.

Sources

Obtained primarily from liquid air by fractional distillation. Small amounts are made in the laboratory by electrolysis of water or heating potassium chlorate (KClO3) with manganese dioxide (MnO2) catalyst.

8
Protons
8
Electrons
8
Neutrons

O

Element Symbol
O
Atomic Weight
15.999
Atomic Number
8
State
Gas
Melting Point
Unknown
-218.4
°C
Boiling Point
-183
Unknown
°C
Heat of Vaporization
3.4099
Unknown
kJ/mol
Crystal Structure
Cubic
Thermoconductivity
0.0002674
Unknown
W/cmK
Shells
2,6
Group
Non-Metal
Period
2
Block
P Block
Orbitals
[He] 2s2 2p4
Coefficient of Thermal Expansion
780 10^-6 K^-1
Covalent Radius
0.73 Å
Density at 293K
0.001429 g/cm³
Electrical Conductivity
--
First Ionization Potential
13.6181 V
Second Ionization Potential
35.117 V
Third Ionization Potential
54.934 V
Ionic Radius
1.40 (-2) Å
Oxydation States
-2
Lattice Parameter
--
Lattice Parameter 2
--
Lattice Parameter 3
--
Pronounced

OK-si-jen

Discovered by

Joseph Priestly, Carl Wilhelm Scheele

Discovery date

1774

Orbital configuration
2,6

Download the Periodic Table

Explore Other Non-Metals

12.011
6

C

Carbon
30.974
15

P

Phosphorus
1.008
1

H

Hydrogen
78.971
34

Se

Selenium
32.06
16

S

Sulphur
14.007
7

N

Nitrogen
Non-metals are the substances that do not exhibit such characteristic of metals as hardness, mechanical adaptability or the ability to conduct electricity. This series contains a few non-metals located in different groups of the periodic table: hydrogen (H), carbon (C), nitrogen (N), phosphorus (P), oxygen (O), sulfur (S) and selenium (Se).
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