Aleks Placement Test: Chemistry With 100% Correct Answers
13 mal angesehen 0 mal verkauft
Kurs
Placement
Hochschule
Placement
Aleks Placement Test: Chemistry With 100%
Correct Answers
Matter - answerAnything that has mass and takes up space; made of atoms
Atoms - answerBasic unit of matter which cannot be broken down and contain mostly empty
space; contains three parts: the electron, proton, and neutron
Elements - an...
Aleks Placement Test: Chemistry With 100% Correct Answers Matter - answer✔✔Anything that has mass and takes up space; made of atoms Atoms - answer✔✔Basic unit of matter which cannot be broken down and contain m ostly empty space; contains three parts: the electron, proton, and neutron Elements - answer✔✔A pure substance that contains only one type of atom Compound - answer✔✔Two or more elements that are chemically bonded; includes ionic and covalent Mixture - answer✔✔Two or more substances that are together but not bonded Pure Substance - answer✔✔Substance that contains only one kind of compound Bose -Einstein Condensate - answer✔✔The state of matter with the lowest energy; basically a very cold solid Solid - answe r✔✔A state of matter with strong bonds Liquid - answer✔✔A state of matter with weak bonds Gas - answer✔✔A state of matter with no bonds Plasma - answer✔✔The state of matter with the highest energy; it uses ionization instead of bonds Robert Boyle - answer✔✔First to define an element; any substance is a substance unless it can be broken down John Dalton - answer✔✔Used and combined previous ideas to discuss the atom; elements are made of atoms; all atoms of an element are identical; atoms of different element s are different; law of constant composition; atoms are invisible Law of Constant Composition - answer✔✔Atoms of one element can combine with other elements to form compounds; a given compound always has the same relative numbers and types of atoms J.J. Th omson - answer✔✔Discovered electrons and protons and developed the plum pudding model of an atom Electrons - answer✔✔The negatively charged particle in an atom; circles around the nucleus in the electron cloud Proton - answer✔✔The positively charged particle in an atom; located in the nucleus; determine the element Neutron - answer✔✔The neutral particle in an atom; it has no charge and is located in the nucleus Plum Pudding Model - answer✔✔A model of the atom th at depicts a sphere of positive charge with electrons scattered throughout Ernest Rutherford - answer✔✔Conducted an experiment in which he shot alpha particles at gold foil; roved there was a small, dense nucleus with a positive charge and that protons are positive Metals - answer✔✔Elements located on the left side of the periodic table that want to lose electrons Characteristics of Metals - answer✔✔- Malleable - Ductile - Conductive - Lustrous Malleable - answer✔✔The ability to be molded into shapes Ductile - answer✔✔The ability to be pulled into wire Conductive - answer✔✔The ability to allow heat or electricity to pass through an object Lustrous - answer✔✔The ability to be shiny Nonmetals - answer✔✔Elements located on the right side of the periodic tabl e that want to gain electrons Metalloids - answer✔✔Elements placed in a stair -step line between metals and nonmetals; they have characteristics of both Diatomic Molecules - answer✔✔Elements that occur in pairs in their natural state; hydrogen, nitrogen, ox ygen, fluorine, chlorine, bromine, iodine Electronegativity - answer✔✔The ability of a molecule to attract electrons to it; increases as you move left to right in the table and decreases as you move top to bottom; fluorine is the hardest Atomic Radius - answer✔✔The radius of an atom; decreases as you move left to right and increases as you move top to bottom Ionization Energy - answer✔✔The energy needed to rip off an electron; increases as you move left to right and decreases as you move top to bottom Ion - answer✔✔An atom that has gained or lost electrons Anion - answer✔✔An atom that gains electrons and has a negative charge; nonmetals Cation - answer✔✔An atom that looses electrons and has a positive charge; metals Isotope - answer✔✔An atom that has changed its number of neutrons Atomic Number - answer✔✔A unique number to each element that tells the number of protons and the number of electrons if the atom is neutral Atomic Mass - answer✔✔A number that tells the number of protons and neutrons in an atom Neut ron Number - answer✔✔Atomic Mass - Atomic Number Radioactive - answer✔✔A nucleus that spontaneously decomposes, forming a different nucleus and producing one or more particles; alpha, beta, and gamma ray Alpha Particle - answer✔✔One type of radioactive par ticle; it is a essentially a helium nucleus; when this type of particle is released, the mass of the atom is conserved and so is the atomic number Beta Particle - answer✔✔One type of radioactive particle; it is essentially an electron; when this type of particle is released, the atomic mass is conserved and the atomic number gains one (a neutron is changed to a proton) Gamma Ray - answer✔✔One type of radioactive particle; it is a high energy photon of light and is used to release excess energy; the atom is not changed at all Half-Life - answer✔✔The time required for half of the original sample of nuclei to decay; each radioactive nucleus of the same e lement has the same half -life; the shorter the half -life, the more likely a nucleus will decay Percent Abundance - answer✔✔Elements exist naturally in different isotopes, to the atomic mass listed on the table is an average Percent Abundance Equation - answer✔✔Average Mass = (%) •(Mass of Isotope A) + (%) •(Mass of Isotope B) +... Crest - answer✔✔The highest point of a wave Trough - answer✔✔The lowest point of a wave Wavelength - answer✔✔The distance between the crests of a wave; symbol is lambda
Alle Vorteile der Zusammenfassungen von Stuvia auf einen Blick:
Garantiert gute Qualität durch Reviews
Stuvia Verkäufer haben mehr als 700.000 Zusammenfassungen beurteilt. Deshalb weißt du dass du das beste Dokument kaufst.
Schnell und einfach kaufen
Man bezahlt schnell und einfach mit iDeal, Kreditkarte oder Stuvia-Kredit für die Zusammenfassungen. Man braucht keine Mitgliedschaft.
Konzentration auf den Kern der Sache
Deine Mitstudenten schreiben die Zusammenfassungen. Deshalb enthalten die Zusammenfassungen immer aktuelle, zuverlässige und up-to-date Informationen. Damit kommst du schnell zum Kern der Sache.
Häufig gestellte Fragen
Was bekomme ich, wenn ich dieses Dokument kaufe?
Du erhältst eine PDF-Datei, die sofort nach dem Kauf verfügbar ist. Das gekaufte Dokument ist jederzeit, überall und unbegrenzt über dein Profil zugänglich.
Zufriedenheitsgarantie: Wie funktioniert das?
Unsere Zufriedenheitsgarantie sorgt dafür, dass du immer eine Lernunterlage findest, die zu dir passt. Du füllst ein Formular aus und unser Kundendienstteam kümmert sich um den Rest.
Wem kaufe ich diese Zusammenfassung ab?
Stuvia ist ein Marktplatz, du kaufst dieses Dokument also nicht von uns, sondern vom Verkäufer Brainbarter. Stuvia erleichtert die Zahlung an den Verkäufer.
Werde ich an ein Abonnement gebunden sein?
Nein, du kaufst diese Zusammenfassung nur für 12,00 €. Du bist nach deinem Kauf an nichts gebunden.
