at about 400 B.C Democritus said that he thinks that all matteris made up of tiny hard/uncuttable called atomos which are now called atoms
hi im Democritus and i believe that all matter is made out of tiny and hard particles called atoms
In 1808 John Dalton created the first ever atomic theory. the theorywas that atoms were invisible and indestructible
i think that atoms are invisible and indestructible
in 1869 Dimitri Mandeleev created the periodic table using the Mandeleev theory. he did it by arranging 63 elemts by atomic mass into the periodic table
im going to arrange 63 elements by atomic mass and call it the periodic table
in 1897 jj Thomsom found out there are negatively charged particles which he called corpuscles but are now called electrons
i found out there are negatively charged particles
in 1910 Ernest Rutherford did the gold foil experiment and also proved jj Thomson plum pudding theory wrong . he finished by saying the atom has a small, dense positively charged nucleus in the centre of the atom that is surrounded by negatively charged electrons
i found out that in the experiment most of the particles go through the the gold. the atom has a dense center called a nucleus
in 1932 James Chadwick discovered nuetrons inside thenucleus
