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15 hours ago · The electron, on the other hand, is thought to be stable on theoretical grounds: the electron is the least massive particle with non-zero electric charge, so its decay would violate charge conservation. The experimental lower bound for the electron's mean lifetime is 6.6 × 10 28 years, at a 90% confidence level. Quantum properties
5 days ago · The five physical state symbols are solids (s), liquids (l), gases (g), aqueous solutions (aq), and plasma. These symbols are used to represent the different states of matter in chemistry. What are symbols used for in chemistry? Symbols are used in chemistry to represent elements, compounds, reactions, and physical states of matter.
2 days ago · Antimony is a chemical element; it has symbol Sb (from Latin stibium) and atomic number 51. A lustrous grey metal or metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb 2 S 3). Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name kohl.
2 days ago · Phase and State Changes refers to the transformation of a thermodynamic system from one phase or state to another. Although the terms ‘phase’ and ‘state’ are used interchangeably, they are in fact different ways to describe a chemical system. A ‘state’ of matter is a more specific term than a ‘phase’ of matter.
3 days ago · Sodium is a chemical element; it has symbol Na (from Neo-Latin natrium) and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable isotope is 23 Na. The free metal does not occur in nature and must be prepared from compounds.
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5 days ago · Molten state is the liquid state of a substance. Mercury and Bromine are metals that are present in a molten state at room temperature (25oC) ( 25 o C) and normal pressure. Also, there are metals like Caesium, Francium, Rubidium, and gallium that liquefy when there is a slight increase in temperature (25o −40oC) ( 25 o − 40 o C) and 1 atm.
