a. Which models represent isotopes of the same element? b. What is the atomic number for (a)? c. What is the mass number for (b)? 141. In which group are the unreactive nonmetals found? 142. What are two properties of the halogens? 143. Which elements are in the same group as oxygen? You can use the periodic table to answer this. 144. Using the periodic table, determine which two groups have highly reactive metals. 145. Determine the identity of each element described below: a. This metal is very reactive, has properties similar to magnesium, and is in the same period as bromine. b. This nonmetal is in the same group as lead. c. This metal is the most reactive metal in its period and cannot be found uncombined in nature. Each atom of the element contains 19 protons.
a. Which models represent isotopes of the same element? b. What is the atomic number for (a)? c. What is the mass number for (b)? 141. In which group are the unreactive nonmetals found? 142. What are two properties of the halogens? 143. Which elements are in the same group as oxygen? You can use the periodic table to answer this. 144. Using the periodic table, determine which two groups have highly reactive metals. 145. Determine the identity of each element described below: a. This metal is very reactive, has properties similar to magnesium, and is in the same period as bromine. b. This nonmetal is in the same group as lead. c. This metal is the most reactive metal in its period and cannot be found uncombined in nature. Each atom of the element contains 19 protons.
Midterm%20Review%20Questions%202014%20for%20All%20Concepts%20from%20September-%20December.docx