CHEMISTRYCOMPOSITION OFMATTERAnything that occupies space and has mass (solid, liquid, gas)Mass– amount of matter in an object Weight– gravitational force acting on objectELEMENT– simplest form of matterEx. C, H, O, N, Ca, K, Na, ClATOM– smallest particle of an element– contains protons, electrons, and neurons Proton– POSITIVE (+) charge, inside nucleus Electron– NEGATIVE (-) charge, inside nucleus Neutron– neutral, inside nucleus Atomic Number– number of protons in each atom Mass Number– number of proton and nucleus in each atomCHEMICAL BONDS– occurs when outermost electrons are transferred or shared between atomsIONcharged particle Ionic Bonding (Transferring)– attraction between two oppositely charged are transferred or sharedbetween atomsEx. NaCl Covalent Bonding (Sharing)– atoms share one/more pairs of electronEx. Hydrogen molecule Polar Covalent bonds– unequal sharing of electronsEx. Water (H2O) Polar Molecules– dsymmetrical electrical charge Nonpolar Molecules– symmetrical electrical chargeHYDROGEN BONDS– forms when + end of 1 polar molecule is weakly attracted to – end ofanother polar molecule– weaker bondPolar MoleculesPositive endNegative endMOLECULE– 2 or more atoms chemically combineEx. Water (H2O)COMPOUND– chemical combination of 2 or more different types of atomsEx. NaClCHEMICAL REACTIONS– formation / breaking of chemical bonds Reactions- … Purchase document to see full attachment
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