Chromium Element in Periodic Table | Atomic Number Atomic Mass

Chromium Element:

The chemical element Chromium is a steely-grey, lustrous, hard and brittle metal. Its atomic number is 24 and represented by the symbol Cr. It is d-block transition metal. In the periodic table of elements Cr is a member of group 6 and period 4. Cr is the 22^nd most common element found in the Earth's crust, but it is not found in its free metal form.Instead it is mainly found in chromite ore. Four known isotopes, ⁵²Cr, ⁵³Cr, ⁵⁴Cr and ⁵²Cr are present in naturally occurring Chromium. ⁵²Cr, ⁵³Cr, ⁵⁴Cr are the most stable isotopes.

Uses Of Chromium Element:

• It  is used in manufacture of stainless steel and other alloys.
• Chromium compounds are used as industrial catalysts
• Chromium compounds are used as pigments in green, yellow, red and orange colours.
• For polishing steel to shine like mirror, chromium plating is used. Chromium plated plastics are commonly used in sanitary fittings.
• Chromium is a key element for humans because it helps to use glucose. However, it is poisonous in excess.

Chromium Element Information:

Discovery year: 1797, 1798

Discovered by: Louis Nicolas Vauquelin

Atomic number: 24

Relative atomic mass: 51.996 

Electron configuration: [Ar] 3d⁵ 4s¹

Block:d-block

Other elements in the same block:

Scandium, Titanium, Vanadium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Lanthanum,  Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Actinium, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium and  Copernicium are the elements in the same block.

Period: period 4

Other elements in the same period:

Potassium, Calcium, Scandium, Titanium, Vanadium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Selenium, Bromine and Krypton.

Group: group 6

Other elements in the same group:

Molybdenum, tungsten and Seaborgium are the elements in the same group.

Other elements in the same orbital:

Scandium, Titanium, Vanadium, Manganese, Iron, Cobalt, Nickel, Copper and Zinc are the elements in the same orbital.

Allotropes: none

Key isotopes: ⁵²Cr 

Melting point: 1907°C, 3465°F, 2180 K

Boiling point: 2671°C, 4840°F, 2944 K

Element category: transition metal

Density (g cm⁻³): 7.15

CAS number: 7440-47-3

Color: silvery metallic

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Hydrogen, Helium, LithiumBeryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine,  Neon , Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulfur, Chlorine, Argon, Potassium, Calcium, Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Gallium, Germanium, Arsenic, Selenium, Bromine, Krypton,  Rubidium, Strontium, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Indium, Tin, Antimony, Tellurium, Iodine, Xenon,  Caesium, Barium, Lanthanum,  Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thulium, Ytterbium, Lutetium, Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Thallium, Lead, Bismuth, Polonium, Astatine, Radon,  Francium, Radium, Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Darmstadtium, Roentgenium, Copernicium, Nihonium, Flerovium, Moscovium, Livermorium, Tennessine, Oganesson.