The Periodic table

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Across
  1. 2. what is one of the noble metals
  2. 4. affinity When energy is released in a chemical reaction or process, that energy is expressed as a negative number.
  3. 8. what is the happy number
  4. 10. what is the first row called on the periodic table called
  5. 11. what is the change of a calcium ion with 18 electrons
  6. 13. metals what row has the stable metals
  7. 14. what is the periodic table order by
  8. 15. Radius generally decrease from left to
  9. 18. protons:78 Neutrons:17 platinum has a mass number of 195 and contains 74 electrons. How many protons and neutrons and its charge is/
  10. 19. how much charge dose OH- have
  11. 20. what is the formula for radius
Down
  1. 1. S stands for
  2. 3. is a vertical column of the periodic table
  3. 5. the ions that are positive are called
  4. 6. what dose P equal
  5. 7. What is the most of on the periodic table
  6. 9. who wants to be the most stable
  7. 12. solve C2 H3 O2
  8. 16. The s-block elements and the p-block elements are together called the
  9. 17. if it has 6protons and 5electrons what is the charge
  10. 21. Mendeleev who published a periodic table of the elements.