CHEMISTRY FINAL EXAM- LATEST VERSION 2023

gram - Answer-SI unit for mass liter - Answer-SI unit for volume density - Answer-the amount of mass in a given volume (units: g/mL) exothermic - Answer-a reaction that releases heat as a byproduct pure substance - Answer-either an element or a compound chemical forumla - Answer-show the kind(s) and proportions of atoms in a compound (Ex: H2O) Chemical equation - Answer-a way to describe a chemical reaction using chemical formulas for substances and symbols for state of matter. solute - Answer-the substance being dissolved in a solution solvent - Answer-the dissolving agent in a solution isotope - Answer-Atoms of the same element that have different numbers of neutrons (and different mass numbers) mass number - Answer-in an atom, the number of protons plus the number of neutrons atomic number - Answer-the number on the periodic table that identifies the element and the number of protons it possesses. valence electron - Answer-electrons in an atom's outermost energy level Rutherford's gold foil experiment - Answer-Experiment that helped to illustrate that the atom is mostly empty space with a small, dense, positively charged nucleus. period - Answer-row on periodic table group - Answer-a vertical column on the periodic table Mendeleev - Answer-Russian chemist who developed a periodic table of the chemical elements and predicted the discovery of several new elements ()