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Carbon-14 has a half-life of 5,730 ± 40 years—, half the amount of the radioisotope present at any given time will undergo spontaneous disintegration during the succeeding 5,730 years.

Because carbon-14 decays at this constant rate, an estimate of the date at which an organism died can be made by measuring the amount of its residual radiocarbon.

Carbon-14 is continually formed in nature by the interaction of neutrons with nitrogen-14 in the Earth’s atmosphere; the neutrons required for this reaction are produced by cosmic rays interacting with the atmosphere.

Right side will show list of members who are present in that room.Clicking a members names in the right side list will show the "user options" as shown in the image above and each option is explained below.Mention Mention allows to mention a member in your message and it will appear highlighted to them.Whisper After typing your message, selecting "whipser" option will send your message as a whisper.A whisper is only visible to you and the person it was sent to.