In a world-shattering discovery, English physicist J.J Thomson disproved the idea that atoms are indivisible. Charcoal, graphite, and diamond have many differences in properties from one another despite having similar structures which suggest there may exist an underlying explanation as to why this happens.
While Dalton was considered a pioneer of modern chemistry, some of his theories were later proven inaccurate. In a chemical reaction, atoms are rearranged, separated, or recombined to form new compounds but no atom is created or destroyed.The resulting particle is called a molecule. Chemical compounds are made up of at least 2 atoms of different elements.Atoms of different elements vary in size, mass, and chemical behavior.
All atoms of the same element are identical and have the same mass.Matter is made up of atoms, small and indivisible particles.What are the 5 Points of Dalton's Atomic Theory?ĭalton's Atomic Theory was formulated by John Dalton in 1808, and it remains a fundamental tenet of chemistry to this day.