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An element's tendency to react is closely related to internal factors such as surface area and particle size. External factors that influence reaction include temperature and pressure. More »

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Rate of diffusion is influenced by several factors including temperature, concentration difference and particle size. The diffusion rate is also affected when there is a change in distance between the points where diffus... More »

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Increasing the surface area of a substance involved in a chemical reaction exposes more of the material to the reactant, thereby speeding up the reaction process. This is why chemists often use powder, filings and other ... More »

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A catalyst speeds up a reaction by increasing the number of successful particle collisions between reactive substances. In a typical reaction, the majority of particles do not have enough energy to react, and thus they s... More »

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The difference between alpha and beta decay is that during alpha decay, an atomic nucleus ejects an alpha particle, which is identical to a helium nucleus with no electrons, while during beta decay, the nucleus ejects an... More »

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Diffusion is the spontaneous movement of any type of particle or molecule from an area of high concentration to an area of low concentration, while osmosis is the diffusion of water across a semi-permeable membrane. Osmo... More »

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The smallest subatomic particle is the quark. Quarks make up larger subatomic particles called hadrons, which include baryons and mesons. Three quarks make up composite particles called baryons, and the combination of a ... More »

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