1. Democritus - describe members as little badly balls or invisible little compact sphere atomic number 18 in motion continually in empty space. He named these particles atoms, the indivisibles.
2. Empedocles- affirmed that there are four fundamental unchangeable instalments: earth, fire, water and station. These elements unify temporarily to form matter.
3. Aristotle- was one of the more believers of the four - element. He added that the elements change from one from to the other by adding or removing heat and moisture. He also believed that love is the jam that unites the elements and strife is the force that disunites the elements.
4. Thales believed that water is the primary element; Anaximenes believed that air is the primary element; Heraclitus believed that fire is the primary element.
In 1803, potty Dalton concluded that the properties of matter could be explained in terms of atoms. Daltons atomic theory of matter was based on the adjacent postulates:
1. All matter is made up of extremely small, long-lasting or indivisible particles called atom.
5. All atoms of a given element are identical, but they differ from those of any other element.
6. The atom is the smallest part of an element that can take part in a chemic reaction.
7.
Atoms combine in ratios of small only numbers to form different chemical compounds. ( lawfulness of Definite Proportion)
8. Atoms are neither created nor destroyed in any chemical reaction. (Law of double Proportion)
The Law of Conservation of Mass states that in a chemical reaction, the total mass of the reactant is equal to the total mass of the products.
The Law of Definite/Constant Composition states that: A given chemical compound always contain the same proportion by mass of its constituent elements.
The Law of Multiple Proportions states that: When two elements combine to form two or more different compounds, if the fall of one element is constant, the masses of the other...If you want to get a full essay, order it on our website: Orderessay
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