Chem 103 Module 1 To 6 Exam Answers Portage Learning ( A+ Graded 100% Verified)

covalent compound {Ans: compound whose atoms are held together by covalent bonds}Halogens {Ans: Contains nonmetals, 7 valence electrons in it's outermost energy level. Very reactive}pure substance {Ans: A sample of matter, either a single element or a single compound, that has definite chemical and physical properties}Cation {Ans: A positively charged ion}Element {Ans: A pure substance made of only one kind of atom}Accuracy {Ans: how close a measurement is to the true value}Anion {Ans: A negatively charged ion}noble gases {Ans: Group 18}main group elements {Ans: Groups 1, 2, 12-18}Compound {Ans: A substance made up of atoms of two or more different elements joined by chemical bonds}ionic bond {Ans: Formed when one or more electrons are transferred from one atom to another}Molecule {Ans: A group of atoms bonded together}transition metals {Ans: 3-11}Metalloid {Ans: An element that has some characteristics of both metals and nonmetals}physical change {Ans: a change of matter from one form to another without a change in chemical properties}atomic mass {Ans: The average mass of all the isotopes of an element}Precision {Ans: The degree to which repeated measurements show the same result.}period (also,