The Periodic Table - Page 13

Questions
  • What are periodic table groups and what do they represent?
  • Can someone please explain me? I have some questions about the Periodic Table...(sorry for any grammar mistake)
  • Why IA group elements are called alkali metals and IIA group are called alkaline earth metal?? Thanks a lot .
  • Why the entire d block starts with group IIIB and not IB (these are placed right after VIIIB)?
  • How many Group 1 elements are there?
  • What are two examples of elements from Group 15?
  • What is the atomic mass of silicon?