CHMA10H3 Chapter Notes - Chapter 2: Nonmetal, Transition Metal, Weighted Arithmetic Mean
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CHMA10H3 Full Course Notes
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An atom is the smallest identifiable unit of an element. 2. 2 early ideas about the building blocks of matter. Leucippus and democritus: proposed that matter is composed of small, indestructible particles called atomos, proposed that many different kinds of atoms existed each with different in shape and size and they moved randomly through empty space. Plato and aristotle: matter had no smallest parts and that different substances were composed of various proportions of fire, air, earth, and water. 2. 3 modern atomic theory and the laws that led it. In a chemical reaction, matter is neither created nor destroyed. When a chemical reaction occurs the total mass of the substances involved does not change. Law is consistent with the idea that matter is composed of small, indestructible particles. Particles rearrange during a chemical reaction, but the amount of matter is conserved b c the particles are indestructible.
