Aleks Placement Test: Chemistry (All Correctly Answered) 2024.

Matter correct answers Anything that has mass and takes up space; made of atoms Atoms correct answers Basic unit of matter which cannot be broken down and contain mostly empty space; contains three parts: the electron, proton, and neutron Elements correct answers A pure substance that contains only one type of atom Compound correct answers Two or more elements that are chemically bonded; includes ionic and covalent Mixture correct answers Two or more substances that are together but not bonded Pure Substance correct answers Substance that contains only one kind of compound Bose-Einstein Condensate correct answers The state of matter with the lowest energy; basically a very cold solid Solid correct answers A state of matter with strong bonds Liquid correct answers A state of matter with weak bonds Gas correct answers A state of matter with no bonds Plasma correct answers The state of matter with the highest energy; it uses ionization instead of bonds Robert Boyle correct answers First to define an element; any substance is a substance unless it can be broken down John Dalton correct answers Used 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 correct answers 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. Thomson correct answers Discovered electrons and protons and developed the plum pudding model of an atom Electrons correct answers The negatively charged particle in an atom; circles around the nucleus in the electron cloud