Periodic Table, Valence Electrons, Ions - Solved Quiz | GSCI 101, Quizzes of Physical Chemistry

Download Periodic Table, Valence Electrons, Ions - Solved Quiz | GSCI 101 and more Quizzes Physical Chemistry in PDF only on Docsity! GSCI 101 Dr. B. Augustine Spring 2003 Name: _______________________________ JMU ID Number: ____________________________ Quiz #3: Periodic Table / Valence Electrons / Ions 1. How many valence electrons does a silicon atom have? ______4_________ 2. The ______halogen____________ group forms a –1 anion in order to achieve a noble gas configuration. 3. Sketch the orbital shell diagram of a Ca2+ ion. Indicate next to the drawing the number of electrons and protons 20 + 18 e- Electrons: ____18________ Protons: _____20________ 4. What would the proper formula of a beryllium cation (a Group 2 element) and a phosphate (PO43-) anion be? Be3(PO4)2 (note Be is a 2+ ion b/c it is in the second group, and using the crossing rule, the 2+ goes into the subscript of the phosphate and the 3- goes into the subscript of the Be)