All the elements after Uranium(atomic no. 92) have been artificially produced.
Summer school sucks i know. The answer is They were produced by nuclear reactions.
Astatine is produced by nuclear reactions.
You add or remove one or more neutrons from each atom.
In nuclear reactions the atom itself changes while molecules and/or structural organisation of atoms do in chemical and physical changes.
Elements that have greater atomic masses then uranium are created using nuclear fission.
Summer school sucks i know. The answer is They were produced by nuclear reactions.
From hydrogen, isotopes of helium are formed through nuclear reactions.
Heavy elements were formed in stars, and blown out into space in supernova explosions.
New elements can by obtained only by nuclear reactions.New molecules can be obtained by chemical reactions.
nuclear reactions
Nuclear energy is not produced by chemical reactions
Synthetic elements are obtained by nuclear reactions.
Protactinium is a natural chemical element; but protactinium can be obtained artificially by nuclear reactions from 232Th.
Protactinium is a natural chemical element; but protactinium can be obtained artificially by nuclear reactions from 232Th.
by nucleoli fission reactions
Astatine is produced by nuclear reactions.
Isotopes are formed either naturally through radioactive decay of elements or artificially through element irradiation by particles as neutrons, protons, electrons, or alpha particles in accelerators or nuclear reactors through nuclear fission or nuclear fusion reactions in nuclear reactors.supernovasparticle acceleratorsnuclear reactorsnuclear explosionsradioactive decay