Week 13 chem 1011 Questions With Complete Solutions

Representative Elements correct answer: Groups 1, 2, 13-18 The outer e- belongs to 's' or 'p' groups Metals correct answer: Elements that readily lose electrons (form cation), giving them a high heat and electrical conductivity levels, high luster and variety of hardness Nonmetals correct answer: Readily gain e-, do not generally conduct heat/electricity Usually liquids and gases, some soft solids Metalloids correct answer: Elements that may accept or donate electrons readily and possess a mixture of metallic and nonmetallic properties don't typically form monatomic anions What is a semiconductor? correct answer: Metalloids How dod nonmetals bond correct answer: Covalent (both want e-) Passivation correct answer: spontaneous formation of a stable oxide layer that minimizes corrosion (Mg, Al, tin, zn react) Alkali metals correct answer: Group 1 Highly reactive (1 outer 1-), never found free in nature, used to reduce other elements, very soluble in water What is used to isolate alkali metals correct answer: Electrolysis Alkaline earth metals correct answer: Group 2 Salts= insoluble Still highly reactive Mg is lightest Pidgeon process correct answer: The production of purified magnesium from a reaction of magnesium oxide and silicon (removes mg vapor to shift equilibrium)