Monday, October 31, 2011

10/31

Beryllium                                                                               Silicon
Be                                                                                         Si
4                                                                                           14
                                          

Tuesday, October 25, 2011

Monday, October 24, 2011

Tuesday, October 18, 2011

Friday, October 14, 2011

Thursday, October 13, 2011

Wednesday, October 12, 2011

Monday, October 10, 2011