Aleks Placement Test: Chemistry With 100% Correct Answers

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 - answerA pure substance that contains only one type of atom Compound - answerTwo or more elements that are chemically bonded; includes ionic and covalent Mixture - answerTwo or more substances that are together but not bonded Pure Substance - answerSubstance that contains only one kind of compound Bose-Einstein Condensate - answerThe state of matter with the lowest energy; basically a very cold solid Solid - answerA state of matter with strong bonds Liquid - answerA state of matter with weak bonds Gas - answerA state of matter with no bonds Plasma - answerThe state of matter with the highest energy; it uses ionization instead of bonds Robert Boyle - answerFirst to define an element; any substance is a substance unless it can be broken down John Dalton - answerUsed and combined previous ideas to discuss the atom; elements are made of atoms; all atoms of an element are identical; atoms of different elements are different; law of constant composition; atoms are invisible Law of Constant Composition - answerAtoms 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. Thomson - answerDiscovered electrons and protons and developed the plum pudding model of an atom Electrons - answerThe negatively charged particle in an atom; circles around the nucleus in the electron cloud Proton - answerThe positively charged particle in an atom; located in the nucleus; determine the element Neutron - answerThe neutral particle in an atom; it has no charge and is located in the nucleus Plum Pudding Model - answerA model of the atom that depicts a sphere of positive charge with electrons scattered throughout Ernest Rutherford - answerConducted 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 - answerElements located on the left side of the periodic table that want to lose electrons Characteristics of Metals - answer- Malleabl