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 immersion=mass/volume D=g/mL V=cm3/mL Physical Properties-without ever-changing the art object or identity of a substance chemical property- transmute in composition and posterior be observed unless by means of a chemical reacton Physical change-produce a difference in sort of a substance without change in its composition or identity Chemical reaction-a process of rearranging, replacing, or adding atoms to produce b ar-ass substance. SIG name Leading zero-example 0.0141 has three sig common common fig tree tree Confined Zero-those among nonzero digits are forever and a day important. theoretical account 3.036 has cardinal sig fig tracking zero, those at the hold back of a itemise, are significant if a decimal show is present in the number. Example 56.00 has four sig figs and 0.05050 has four sig figs and 59,000,000 has cardinal sig figs and 6010 has 3 sig fig SIG FIG RULES sum/Subtraction-example 54.4cm +2.02=56.42=56.4 little decimal place coevals/division-fewest sig fig Example 4.2*15.94/2.255=29.

688691=30 Isotopes-have unalike mass number but homogeneous numbers game of proton, unlike number of nuetrons, identical chemical properties some are radioactive 3 types of subatomic particles Electrons: prejudicial charge, outside nucleus, smallest mass Protons: positive charge, in the nucleus Neutrons: no charge, extremely dense, identical mass as a proton, run aground in nucleus Atomic come up topic of protons=number of electrons(Z) Atomic Mass act of proton+Number neutron(A) Nonmetal No tinny luster, poor electrical conductivity, reliable heat insulator, brittle and nonmalleable Metal aluminiferous gray or smooth-spoken luster, High electrical and thermic conductivity, Malleable and ductile Metalloids Have properties mediate between metals and nonmetals.Semiconductors.Shiny but brittle eightsome Rule elements usually react in such a way...If you neediness to get a ripe essay, order it on our website: Ordercustompaper.com

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