What is Sr? Important knowledge about Sr.

Definition of Sr:
Sr is the chemical symbol for the element Strontium, belonging to group 2, period 5 of the periodic table of chemical elements. Strontium has 4 natural isotopes, in which Sr-88 accounts for the highest ratio (82.58%). Strontium has atomic mass of 87.62 and atomic weight of 87.62 u. Its atomic structure includes 38 electrons, 38 protons and 50 neutrons. Strontium may form Sr₂+ ion when it loses 2 outermost electrons.

Properties of Strontium:
2.1 Physical properties: Strontium is a silver-white metal, odorless and pH indeterminable. Strontium is easily ignited in the air and creates a reddish yellow light.
2.2 Chemical properties: Strontium has similar properties to other alkaline earth metals, easily reacts with air, water and acid.

Common chemical equations:

• Reaction with air: 2Sr + O₂ -> 2SrO
• Reaction with water: Sr + 2H₂O -> Sr(OH)₂ + H₂
• Reaction with acid: Sr + 2HCl -> SrCl₂ + H₂
• Reaction with salt: Sr + Na₂SO₄ -> SrSO₄ + 2Na

Synthesis of Strontium:
Strontium is mainly synthesized through the electrolysis of molten Strontium chloride (SrCl₂) in the laboratory. In industry, Strontium is usually synthesized from Celestine ore (SrSO₄) by reducing with coal in a blast furnace.