Elements Crossword

7. It is the second-most electropositive element and the second-rarest naturally occurring element
9. the element with symbol Eu
10. the element whose refrigerating capacity is 40 times more than liquid helium
13. the element with atomic number 103
14. the most diamagnetic element
15. the metal first isolated in 1781 by Peter Jacob Hjelm.
16. the element whose atomic number is 64
17. the element with atomic mass 269 g.mol -1
18. the element officially known as Tennessine
19. the element made by a named after a Scandinavian goddess
20. the element discovered by Albert Ghiorso

1. the element which was first prepared by chemist Aristid V. Grosse
2. the element named after the father of the periodic table
3. Its name was derived from a Greek word meaning "to be concealed"
4. the 66th element in the periodic table
5. the element discovered in Germany
6. the element discovered by Lawrence Livermore National Laboratory and Joint Institute of Nuclear Research.
8. the element with symbol Bh
11. Robert Bunsen and Gustav Kirchhoff discovered this element by the method of flame spectroscopy.
12. the element used by Rutherford in his famous scattering experiment