The answer to “Group Trends in Metals and Nonmetals (Sections)Little is known about the properties of astatine, At, because of its rarity and high radioactivity. Nevertheless, it is possible for us to make many predictions about its properties. (a) Doyou expect the element to be a gas, liquid, or solid at room temperature? Explain. (b) Would you expect At to be a metal, nonmetal, or metalloid? Explain. (c) What is the chemical formula of the compound it forms with Na?” is broken down into a number of easy to follow steps, and 77 words. This textbook survival guide was created for the textbook: Chemistry: The Central Science, edition: 12. Chemistry: The Central Science was written by Sieva Kozinsky and is associated to the ISBN: 9780321696724. This full solution covers the following key subjects: expect, properties, its, explain, make. This expansive textbook survival guide covers 49 chapters, and 5471 solutions. The full step-by-step solution to problem: 78E from chapter: 7 was answered by Sieva Kozinsky, our top Chemistry solution expert on 04/03/17, 07:58AM. Since the solution to 78E from 7 chapter was answered, more than 264 students have viewed the full step-by-step answer.