What defines the element oxygen?
An oxygen atom contains exactly eight protons in its nucleus. This count defines the element as oxygen regardless of how many neutrons surround those protons.
Questions about Chemical element
Short answers, pulled from the story.
When did scientists recognize 118 elements by November 2016?
The International Union of Pure and Applied Chemistry recognized 118 elements by November 2016. The first 94 occur naturally on Earth while the remaining 24 are synthetic elements created in laboratories.
Who discovered phosphorus in 1669 as the first recorded new element?
Hennig Brand discovered phosphorus in 1669 as the first recorded new element. Scientists have produced more than one thousand different isotopes through nuclear transmutation since that time.
How do stars create elements up to iron through alpha processes?
Massive stars create elements up to iron through alpha processes during their life cycles. Iron-56 represents the most stable nuclide produced from fourteen helium nuclei before supernovae explode to forge heavy elements like uranium and plutonium via neutron capture.
On what date was oganesson created in Dubna Russia?
The Flerov Laboratory of Nuclear Reactions created oganesson on the 9th of October 2006 in Dubna Russia. IUPAC officially named four newest elements with atomic numbers 113, 115, 117, and 118 on the 28th of November 2016.