Isotopes and Atoms

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Across
  1. 1. ______ is the formula for water
  2. 3. ________ is tells us the number of protons in an atom
  3. 12. _________ is the group known as Halogens
  4. 13. _______ are the metals in "the dip" of the periodic table
  5. 15. The atomic number of Nitrogen
  6. 16. Protons have a ______ charge
  7. 17. _________ is the group known as noble gases
  8. 19. mass is measured in __ __ __
  9. 21. Smallest unit of matter
  10. 22. Atomic element number 47
  11. 25. The atomic number is always the _________ number
  12. 26. Electrons have a ______ charge
  13. 27. If neon gains an X amount of neutrons, it becomes a _______ ________, but overall, remains to be neon.
Down
  1. 1. Atomic element 1
  2. 2. AMU stands for _______ ________ ________
  3. 4. If Carbon's isotope has two extra neutrons, it goes from being Carbon-twelve to ______-________
  4. 5. Number of ______ and electrons will be the same
  5. 6. Forms of the same atom with a different number of neutrons
  6. 7. Protons and Neutrons live in the __________
  7. 8. Electrons live in the atoms' ________
  8. 9. Neutrons have a _______ charge
  9. 10. _________ is the amount of time it takes for half of a substance to disappear
  10. 11. How do we read periods on the periodic table
  11. 13. How do we read groups on the periodic table
  12. 14. ___________ minus the atomic number to find the number of neutrons
  13. 18. How many neutrons will the isotope Hydrogen-3 have? (3 is in amu
  14. 20. Having more neutrons in the nucleus causes an atom to be ________.
  15. 23. Keep the protons and neutrons from escaping the nucleus
  16. 24. __________ is the collective term for the elements surrounding "the staircase"