https://padlet.com/mansoor_alarayed_4641/6abh9j9vy2w3xe21 three attempts of three scientists to cause the understanding of the atoms. en-us 2020-10-06 04:59:03 UTC 2021-10-13 05:20:02 UTC hello@padlet.com mansoor_alarayed_4641 https://padlet.com/mansoor_alarayed_4641/6abh9j9vy2w3xe21/wish/805583877 His theory held that everything is composed of "atoms," which are physically, but not geometrically, indivisible; that between atoms, there lies empty space; that atoms are indestructible, and have always been and always will be in motion; that there is an infinite number of atoms and of kinds of atoms, which differ in shape and size. ]]> 2020-10-06 05:02:33 UTC https://padlet.com/mansoor_alarayed_4641/6abh9j9vy2w3xe21/wish/805583877 mansoor_alarayed_4641 https://padlet.com/mansoor_alarayed_4641/6abh9j9vy2w3xe21/wish/805591210 The first breakthrough in the study of chemical reactions resulted from the work of the French chemist Antoine Lavoisier between 1772 and 1794. Lavoisier found that mass is conserved in a chemical reaction. The total mass of the products of a chemical reaction is always the same as the total mass of the starting materials consumed in the reaction. His results led to one of the fundamental laws of chemical behavior: the law of conservation of matter, which states that matter is conserved in a chemical reaction]]> 2020-10-06 05:06:56 UTC https://padlet.com/mansoor_alarayed_4641/6abh9j9vy2w3xe21/wish/805591210 mansoor_alarayed_4641 https://padlet.com/mansoor_alarayed_4641/6abh9j9vy2w3xe21/wish/805596202 2020-10-06 05:10:02 UTC https://padlet.com/mansoor_alarayed_4641/6abh9j9vy2w3xe21/wish/805596202 mahmoudgameel https://padlet.com/mansoor_alarayed_4641/6abh9j9vy2w3xe21/wish/1812944095 2021-10-13 05:20:02 UTC https://padlet.com/mansoor_alarayed_4641/6abh9j9vy2w3xe21/wish/1812944095