Author: misamaliraza94

What is Chlorine? Chlorine is the second lightest halogen and is represented as Cl. The atomic number of this chemical element is 17. It appears as a pale yellow-green gas. Liquid chlorine can cause skin burn and chlorine in its gaseous form irritates the mucous membrane. Its position as per the periodic table is between fluorine and…

Sulfur Symbol S Atomic Number 16 Atomic Mass 32.06 Discovered by – Chemical Properties Of Sulfur Group 16 Melting point 97.794°C, 208.029°F, 370.944 K Period 3 Boiling point 882.940°C, 1621.292°F, 1156.090 K Block p Density (g cm−3) 0.97 Atomic number 16 Relative atomic mass 32.06 State at 20°C Solid Key isotopes 33S, 34S Electron configuration [Ne]…

Phosphorus (P) Symbol P Atomic Number 15 Atomic Mass 30.974 Discovered by Phosphorus was discovered by Hennig Brandt Chemical Properties Group 15 Melting point 44.15°C, 111.47°F, 317.3 K Period 3 Boiling point 280.5°C, 536.9°F, 553.7 K   Block p Density (g cm−3) 1.823 (white) Atomic number 15 Relative atomic mass 30.974    State at 20°C…

Silicon Symbol Si Atomic Number 14 Atomic Mass 28.0855 g.mol -1 Discovered by Jöns Jacob Berzelius in 1824 Chemical Properties of Silicon Group 14 Melting point 1414°C, 2577°F, 1687 K Period 3 Boiling point 3265°C, 5909°F, 3538 K Block p Density (g cm−3) 2.3296 Atomic number 14 Relative atomic mass 28.085   State at 20°C…

Aluminium Symbol of aluminium Al Atomic Number of aluminium 13 Atomic Mass of aluminium 26.98 amu Discovered by Hans Christian Oersted in 1825 The Atomic Mass of aluminium is 26.98 amu.

Magnesium Symbol Mg Atomic Number 12 Atomic Mass 24.305 Discovered by Magnesium was discovered by Joseph Black Chemical Properties of Magnesium Group 2 Melting point 650°C, 1202°F, 923 K Period 3 Boiling point 1090°C, 1994°F, 1363 K Block s Density (g cm−3) 1.74 Atomic number 12 Relative atomic mass 24.305 State at 20°C Gas Key…

Sodium Symbol Na Atomic Number 11 Atomic Mass 22.990 Discovered by Sodium was discovered by Humphry Davy Physical Properties of Sodium Sodium has a strong metallic lustre and in colour is very analogous to silver. It is soft at common temperatures that it may be formed into leaves by the pressure of the fingers. Sodium…

Neon Symbol Ne Atomic Number 10 Atomic Mass 20.180 Discovered by Neon was discovered by Sir William Ramsay and Morris Travers What is Neon? Neon is reddish-orange coloured in neon lamps and vacuum discharge tubes and a second-lightest noble gas. It is less expensive refrigerant than helium in many applications. It’s refrigerating capacity is 40 times…

Fluorine Symbol F Atomic Number 9 Atomic Mass 18.998403 g.mol-1 Discovered by Henri Moissan Chemical Properties of Fluorine Group 17 Melting point −219.67°C, −363.41°F, 53.48 K Period 2 Boiling point −188.11°C, −306.6°F, 85.04 K Block p Density (g cm−3) 0.001553 Atomic number 9 Relative atomic mass 18.998   State at 20°C Gas Key isotopes 19F…

Oxygen Symbol O Atomic Number 8 Atomic Mass 15.999 g.mol-1 Discovered by Joseph Priestly in 1774 Chemical Properties of Oxygen Group 16 Melting point -219 °c Period 2 Boiling point -183 °c Block p Density (g cm−3) 0.001308 Atomic number 8 Relative atomic mass 15.999 State at 20°C Gas Key isotopes 16O Electron configuration [He]2s2 2p4…