What I Need to Know

What do I need to know for the final? scientific method and why it is important to keep accurate records. -so others dismiss repeat the experiment exactly. Difference b/t forcible and chemical receptions -physicalonly the state is changed (solid/liquid/gas) -chemicalNEW substances ar formed (ex. Rust, burned sugar, soot, ) Changes of states of matter (boiling, melting, evaporation, etc.) wet freezes and melts at 0C pee boils and evaporates at 100C Sub segmentic particles (neutrons/protons/electrons), their deputations, locations, and functions. -electrons (-), protons (+), neutrons (o) -protons AND neutrons be INSIDE the nucleus. -Atomic cast tells you the digit of protons, Its ALSO the total number of electrons. Periodic post horse and the locations and definitions of the atomic deal, atomic number, metals, nonmetals, nonmetals. -Metalloids have BOTH metallic and metalloid properties. They BORDER the zig zag line on the table. -Meta lloids ar usually more brittle and less malleable than nearly metals. -NONmetals be located on the RIGHT of the periodic table. heat-releasing and endothermic answers (how can you tell which is which) - exoergic GIVES OFF heat (energy) and -endothermic TAKES IN heat (energy) -ex.

Nitrogen + oxygen + energy nitrogen oxide energy-absorbing b/c energy went IN. Law of conservation of pickle and law of conservation of energy -mass ---the mass before a reaction will ALWAYS equal the mass afterward a reaction. -energyenergy cannot be created/destroyed only changed forms. Ions-what are they? When are they positive and when are they negative? Positive ion (ex. Fe +)---the atom has LOST electrons (so it lost! a negative debase and became positive). shun ion (ex. Cl-)---the atom GAINED an electron (so it gained a negative charge and became negative). crawl in how to read a line chart of temperature vs. time. If temperature of a reaction DECREASES over time, then its exothermic (it GAVE off...If you want to stand a full essay, order it on our website: OrderEssay.net

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