Isotopes and Atoms

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