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matter is any substance, , MATTE RR that has mass and takes, up space by having, volume., , , , Pure Substance Impure Substance, " Mixture ), , ( stable ), | Compound, , Homogeneous Heterogeneous, , |. — Neutron, ATOM, \ Na, Proton, Electron

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Difference between Elements and Atoms, , Elements Atoms, An element is the An atom is the part of, simplest form of a an element., , substance. Generally, it, cannot be simplified or, broken down further, into smaller particles., , A particular element is, composed of only one, type of atom., , , , AtoPns can also, with each other to fo combine to form, , , , molecules via chemica molecules but if all, , reaction. bound atoms are of, similar type elements, are formed., , Elements are bigger Atoms are very tiny, , and heavier andmass. _ particles, and they, cannot be seen through, a microscope.

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Compounds are formed with Mixtures are formed when, the combinations of two or elements or compounds are, more elements. mixed together. oe, Properties of compounds vary | Mixtures show the properties of, from their constituent their constituent compounds or, elements. ele, the components of compounds | Mixtures components can be, cannot be separated physically” se sically., , e.g. distillation, filtration,, , , , , , , , , , , Compounds are alway. can be, homogenous mixtures ogeneous or, , nature. rogeneous by nature., They show their own _ They don't show their own, characteristics. _characteristics., , Present in a fixed ratio. The ratio of mixtures, components can vary., In a particular compound, the __ In mixtures, the boiling points, , boiling and melting points will | and melting points are not, be constant. ; _constant.

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Mixtures, , Ordinary table salt is called sodium chloride. It is, considered a substance because it has a uni, form and definite composition. All samples of, , , , , , sodium chloride are identical. Water, , , , , , , is also a pure su ce. Salt easily dissolves in, , water, but saltwater classified as a, , not, , substance a its COmposition can vary., , You may dissol¥e a’Small amount of salt or a, , large amo to a given amount of water. A, , —, , mixture is a physical blend of two or more comcee, ponents, each of which retains its own identity, , , , , , and properties in the mixture . Only the form of, the salt is changed when it is dissolved into wa, ter. It retains its composition and properties.

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Homogeneous Mixtures, , A homogeneous mixture is a mixture in which, , , , the composition is uniform throughout the mix, ture. The salt water described above is homoge, , , neous because the dissolved saltis evenly dis, , , , tributed throughout nti ter sample., , Often it is easy onfuse ah neous mix, ture with a p sulpstan ecause they are, both uniform. rence is that the composition of the substance is always the same. The, amount of salt in the salt water can vary from, , one sample to another. All solutions would be, , , , considered homogeneous because the dis, , , solved material is present in the same amount, , , , throughout the solution.