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AP CHEM CHAPTER 2 Flashcards

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14679840936Law of Conservation of MassMass is neither created nor destroyed in chemical reactions0
14679843169Law of Definite Proportions-A given compound always contains exactly the same proportion of elements by mass -Ex, Copper Carbonate is always 5.3 part copper, 4 parts oxygen, and 1 part carbon1
14679844658Law of Multiple Proportions-When two elements form a series of compounds, the ratio of the masses of the second element that combine with 1 gram of the first elements can always be reduced to whole numbers2
14679848579Dalton's Atomic Theory1. Each element is made up of atoms 2. The atoms of a given element are identical 3. When atoms of different elements combine, chemical compounds are formed. A given compound always has the same relative numbers and types of atoms. 4. Chemical reactions involve the rearrangement of atoms. The atoms are not changed.3
14679853463J.J. Thomson-Discovered the electron by doing experiments where high voltage was applied to a tube which produced a cathode ray -Ray was repelled by the negative pole of the electric field in the tube, resulting in the discovery that it was filled with negative charges, called electrons4
14679856236Plum Pudding Model-Thomson Model -Electrons are embedded in a uniform, + charged sphere5
14679862697Radioactivity-Spontaneous emission of particles and/or radiation -3 types of radioactive emission: Gammy (y) rays: high energy light Alpha (a) rays: +2 charge Beta (B) rays: electron6
14679865768Earnest Rutherford-Discovered that the Atom contains a nucleus which is an accumulation of + charged -Most of the atom is empty space --This is why the majority of the particles passes right through7
14679890566Atom-Nuclear Atom: An atom with a dense center of positive charged with electrons moving around the nucleus at a distance that is large relative to the nuclear radius -Subatomic particles: Protons (+): in Neuclue, very small mass Neutrons (/): in nucleus Electrons (-): in orbit8
14679893003Atomic Number# of Protons in the nucleus of an atom (also e- bc neutral)9
14679894481Mass Number# of Neutrons and Protons present in the nucleus of an atom10
14679895684IsotopesAtoms of the same element that have different numbers of neutrons -Show almost identical chemical properties11
14679903860Diatomic molecule vs polyatomicDiatomic molecule: Contains only 2 atoms Polyatomic molecules: Contains more than 2 atoms12
14679907637Structural formulaIndividual bonds of the module are shown13
14679913050IonAn atom or group of atoms that has a positive or negative charge.14
14679914642Ionic bondingChemical bonding that results from the electrical attraction between cations and anions15
14679915908Cationpositively charged ion (loses electrons)16
14679917035Anionnegatively charged ion (gained electrons)17
14679923047Molecular formulaShows the exact number of atoms of each element in the smallest unit of the substance Ex, O218
14679924232AllotropeOne of two or more distinct forms of an element Ex, O2 vs O319
14679927367Empirical formulasTells the elements present and the simplest whole number ratio of their atoms Simplest chem formulas (not truest)20
14679932542metals vs nonmetalsMetals: Good conductors of heat and electricity malleability, and ductility Tent to form positive ions Nonmetals: To the right of the stairs on the PT tend to gain electrons21
14679934000Groups/Families-Vertical columns -Have similar chemical properties -Different Families: Alkali metals (1A) Alkaline Earth Metals (2A) Halogens (7A) Noble Gases (8A) Monatomic: meaning the only exist in nature as a single atom22
14679936212Periods-Horizontal rows -By atomic number23
146799390841. Naming Type I Binary Ionic Compounds-Only consist of two elements -The cation is always named first then the anion second -Cation uses its normal name -Anion uses its root + ide Ex, NaCl = Sodium Chloride24
146799409472. Naming Type II Binary Ionic Compounds-For transition metals that have varying charge -Charge of the metal ion must be specified (use roman numeral) -Anion root + ide Ex. HgO = Mercury (II) oxide25
14679943200Naming Compounds With Polyatomic Ions-Special names of the polyatomic ions must be memorized -Oxyanions: anions containing an atom of a given elements and different numbers of oxygen atoms 1. Smallest number of oxygen ends in ite 2. Large number of oxygen ends in ate If there are more than 2 oxyanions making up the series: 1. Prefix hypo (less than) used for the least number of oxygen 2. Prefix Per (More than) used to name the members with the most oxygen atoms26
146799456283. Naming Binary Covalent Compounds (Type III)-Formed between two nonmetals 1. Prefix + Cation 2. Prefix + anion root + ide *Prefix indicate number of atoms*: Mono = 1 Di = 2 Tri = 3 tetra= 4 penta= 5 hexa= 6 hepta= 7 octa= 8 nona= 9 Deca = 10 Mono is never used for naming the first elements Drop the "o" or "a" before the prefix 3. ex, PCl5 = Phosphorus Pentacholride27
14679951166AcidsMolecule in which one or more H+ ions are attached to an anion28
14679952288Naming acids without oxygenHydro(anion root)ic acid29
14679952289Naming acids without oxygen1. Anion ends in ite (root)ous acid 2. Anion ends in ate root(ic) acid30
14679961004Formula to name Flowchart31

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