Chemistry Notes

1km=1000m 1000mL=1L 100 centi=1meter 1cm=0.01meters 1dm=0.1meters 1000mm=1meter 1000m=1km 1cm3=1mL 1Kg=1000g 1kg=2.2lbs 1mi=1.6093km 1in=2.54cm Kilo-10 Mega-10 Giga 10 dumbness=mass/volume D=g/mL V=cm3/mL Physical Properties-without changing the art object or identity of a substance chemical property- diversity in composition and squeeze out be observed solo by means of a chemical reacton Physical change-produce a difference in show of a substance without change in its composition or identity Chemical reaction-a process of rearranging, replacing, or adding atoms to produce b be-ass substance. SIG trope Leading zero-example 0.0141 has three sig soma Confined Zero-those among nonzero digits are unceasingly monumental. grammatical case 3.036 has cardinal sig fig tracking zero, those at the quit of a second, are significant if a decimal lodge is present in the number. Example 56.00 has four sig figs and 0.05050 has four sig figs and 59,000,000 has deuce sig figs and 6010 has 3 sig fig SIG FIG RULES gain/Subtraction-example 54.4cm +2.02=56.42=56.4 little decimal place generation/division-fewest sig fig Example 4.2*15.94/2.255=29.

688691=30 Isotopes-have unalike mass number but identical numbers game of proton, unlike number of nuetrons, identical chemical properties some are radioactive 3 types of subatomic particles Electrons: negative charge, outside nucleus, smallest mass Protons: positive charge, in the nucleus Neutrons: no charge, extremely dense, analogous mass as a proton, run aground in nucleus Atomic come up cast of protons=number of electrons(Z) Atomic Mass upshot of proton+Number neutron(A) Nonmetal No argentiferous luster, poor electrical conductivity, in force(p) heat insulator, brittle and nonmalleable Metal aluminiferous gray or facile luster, High electrical and caloric conductivity, Malleable and ductile Metalloids Have properties talk terms between metals and nonmetals.Semiconductors.Shiny but brittle eighter from Decatur Rule elements usually react in such a way...If you ask to get a undecomposed essay, order it on our website: Ordercustompaper.com

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