Examlex
In 1661, who developed a definition of element that made the concept subject to laboratory investigation?
Bromine
A halogen element with the symbol Br and atomic number 35, known for its reddish-brown color and use in flame retardants and other chemicals.
Isotope
Atoms of the same element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.
Neon
Neon is a chemical element with symbol Ne and atomic number 10, known as a noble gas that exhibits a distinct reddish-orange glow when used in lamps and advertising signs.
Synthetic Element
An element that is not found naturally on Earth and can only be created artificially in a laboratory or nuclear reactor.
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