CHM 1045 Unit 1 Exam - Dillon Questions and Answers 100% Solved correctly

___ are forms of matter - Substances ____ _____ provides information about percentages of different isotopes of each element - Mass spectrometer ____ + ____ are polar covalent molecules that dissociate into ions when introduced to water - Acids, bases _____ charge = # of protons > # electrons - positive _____ in an experiment are all the factors that the experimenter attempts to keep the same - Constant ______ charge = # protons < # electrons - negative "-ate" ending means - more oxygens "-ite" ending means - the form has less oxygens "Hypo-" prefix means - least number of oxygens in the series "Per-" prefix means - most number of oxygens in the series # of neutrons + # of protons = - mass number # of protons - # of electrons = - charge of element2 extra rows on periodic table: - Lanthanides + Actinides 5th state of matter: - Bose-Einstein Condensate Alkaline metals form ___ ions - +1 All atoms are composed of ______, _____, + ______ - protons, neutrons, + electrons All matter is composed of _____ - molecules All molecules are composed of _____ - Atoms Allotrope: - one of 2 or more distinct forms of an element examples: oxygen O2 + ozone O3; diamond + graphite (forms of carbon) Aristotle and Plato: - Believed nature of matter was made of 4 elements (earth, fire, air and water) Atom: - smallest unit of matter that retains the identity of the substance Atomic number indicates the # of ___ in an atom - protons Atoms are composed of 2 regions: ____ + ___ - nucleus, electron cloud Bohr Model : - model with nucleus orbited by electrons, which are different in energy levels Chalcogens form ___ ions - -2 Chemical properties = - are those which are observed by changing one substance into anotherChemistry is... - the study of matter