For transition elements, give the trends in atomic radius as you
a. move across a period in the periodic table.
b. move down a column in the periodic table.
Explain the reasons for the trends described in parts a and b.
Chapter 1 - Keys To The Study Of Chemistry *To ﬁnd more information, reference the textbook. The headings used below correspond with those in the textbook. 1.1 Chemistry: The study of matter and its properties, the changes that matter undergoes, and the energy associated with those changes. Matter: The “stuﬀ” of the universe. Anything with mass and Volume ex. air, glass, plants Composition: The types and amounts of simpler substances that make up matter Substances: a type of matter that has a deﬁned, ﬁxed composition The States of Matter 3 Physical Forms (States) Solid: Fixed Shape Liquid: Varying shape, conforms to container only to the extent of liquid’s volume Gas: varying shape, conforms to container, ﬁlls entire conta