Electrons and the periodic table review answers

PERIODIC TABLE REVIEW WORKSHEET 1. Match the man with his contribution to (A) Lothar Meyer with his contribution to the Periodic Table: Doberiner (A) groups of 3.elements, called triads (C) Dmitri Mendelevey (8) graphed atomic weight Vs atomic volune.meyer nendeleyev (c) properties repost every oth element-Newlanas (C) proper (E) Henry Moseley (D) used X-rays to define "atomic numbers'-moseley (E) "periodic law" based on atomic weights-menckeleen 2. Identify an A periodic tables (A) period (D) transition metal (G) inert gas (Group 18 ) (B) family or group (E) alkaline earth (H) rare earth (C) metalloids (F) alkali metal/ (I) halogen . 3. Which element is more active and WHY? (A) Oxygen or sulfur E calcium or barium 4. In what period and what group does selenius (At. No. 34) belong periodu, Group 16 5. In general, in the main groups where are the elements which are (A) more metallic (D) less metallic (B) more non-metallic (E) less non-metallic (C) most active metals (F) most active non-metals 6. Give the electron dot structures for the first ten elements. 7. An atom with outermost electron in the fourth energy level is in what period? hamn 8. Which elements tend to gain electrons? Lose electrons? 9. What element does not clearly fit one place on the periodic table? 10. What family would include a neutral atom having 2 electrons in its outer most energy level? 11. What atomic structure makes one period different from another? 12. What atomic structure makes one family different from another? 13. How was Mendeleyev able to predict the properties of the elements that were missing from his periodic table? 14. Define "Ionization Energy." Why is it important? 15. Why is it harder to remove one electron from calcium than from potassium? Why is it harder to remove the SECOND electron from potassium than from calcium?