<span>John Dalton introduced a theory proposing that elements vary because of the mass of their atoms.
He said in his theory that all matter is made up of indivisible blocks called atoms. He also stipulated in his theory that elements are identical thus, have different sizes and masses.
Dalton's theory was different from Niels Bohr who proposed a new atomic model which was also commonly known as the modern atomic theory. Bohr's theory says that atoms are arranged in circular orbits around the nucleus. He patterned his model as the solar system.
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the bonds that keep the molecules together break apart and form new bonds during chemical reactions.
H2O as it has a relative atomic mass of 18
He was best known for the Continental Drift
Visible lights in order of decreasing frequency:
Voilet > Indigo > Blue > Green > Yellow > Orange > Red
Hope this helps!
