Plz which of the following pairs of elements could possibly be found in the same group on the periodic table? a forms a 2+ ion; b is an alkaline earth metal. a is a noble gas; b forms a 1- ion. a has 3 valence electrons; b is a halogen. a forms a 2- ion; b has the atomic number 12.

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal. b. he is determining chemical properties that are sufficient to identify the metal. c. he is determining physical properties that are insufficient to identify the metal. d. he is determining chemical properties that are insufficient to identify the metal.