Features of the mordern periodic table

123456789101112131415
Across
  1. 2. what are elements like C, O, Cl, I, p etc?
  2. 4. What is the current last element of the modern periodic table?
  3. 6. In what group are the noble gasses kept
  4. 9. What are elements like Th, pa, pa, pu, U called?
  5. 10. what term refers to the radius of an atom?
  6. 12. Elements of which period don not have the same number of valance electrons?
  7. 13. what are elements like Mg, Cu, Zn, Au, Pt etc?
  8. 14. what of an element is determined by the number of valence electrons present in the outermost shell of its atom?
Down
  1. 1. What is the first element of the modern periodic table?
  2. 3. Atoms of different elements with the same number of what are placed in the same period?
  3. 5. What are elements which have both metal and Non-metal properties called?
  4. 7. How many vertical columns/groups does the modern periodic table have?
  5. 8. Elements present in the same group have the same number of what?
  6. 11. How many horizontal rows/periods does the modern periodic table have?
  7. 15. What are elements like Ce, Pr, Nd, Pm called?