Category: Periodic Table

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…

Nitrogen Symbol N Atomic Number 7 Atomic Mass 14.007 Discovered by Daniel Rutherford in 1772 Chemical Properties of Nitrogen Group 15   Melting point −210.0°C, −346.0°F, 63.2 K Period 2 Boiling point −195.795°C, −320.431°F, 77.355 K Block p Density (g cm−3) 0.001145 Atomic number 7 Relative atomic mass 14.007   State at 20°C Gas Key…

Carbon Symbol C Atomic Number 6 Atomic Mass 12.011 Discovered Lavoisier proposed carbon in 1789 The Atomic number of Carbon is 6. Chemical Properties of Carbon Group 14 Melting point Sublimes at 3825°C, 6917°F, 4098 K Period 2 Boiling point Sublimes at 3825°C, 6917°F, 4098 K Block p Density (g cm−3) 3.513 (diamond); 2.2 (graphite)…

Boron Symbol B Atomic Number 5 Atomic Mass 10.821 amu Discovered by Joseph Louis Gay-Lussac in 1808 Chemical Properties of Boron Group 13 (Boron Group) Melting point 2349K Period 2 Boiling point 4200K Block p-block Density (g cm−3) 2.08 (when liquid) Atomic number 5 Electron configuration [He]2s22p1 State at 20°C Solid What is Boron? Boron…

Beryllium Symbol Be Atomic Number 4 Atomic Mass 9.01218 g.mol-1 Discovered by Nicholas Louis Vauquelin What is Beryllium? Beryllium is an element with an atomic number of 4 in the periodic table. It is a bivalent and highly toxic element. The element has one of the highest melting points among the light metals. Beryllium exists in…

Lithium Symbol Li Atomic Number 3 Atomic Mass 6.941 g.mol -1 Discovered by Johann Artvedson in 1817 Chemical Properties Group 1 Melting point 180.5 °C Period 2 Boiling point 2061 °C Block s Density (g cm−3) 0.534 Atomic number 3 Relative atomic mass 6.94 State at 20°C Solid Key isotopes 7Li Electron configuration [He] 2s1 CAS…

Helium Representation of Helium Helium symbol He Helium atomic number 2 Helium atomic mass 4.003 Discovered by Sir William Ramsay in London, Per Teodor Cleve and Nils Abraham Langlet. What is Helium? Helium, the lightest of the noble gases, had actually been detected and helium is the only element in the periodic table that was discovered…

Hydrogen Symbol H Atomic Number 1 Atomic Mass 1.008 Discovered by Hydrogen was discovered by Henry Cavendish Physical Properties Of Hydrogen It is a gas with no colour and odour and has the lowest density of all gases. It is seen as the clean fuel of the future which is generated from water and returned…