Periodic Trends

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Across
  1. 3. Forms a cation with a charge of -3 and is used to help package materials and food.
  2. 5. Its a metal with a low melting point and high chemical reactivity. A cation with a smaller ionic radius than its nutrient neighbor.
  3. 8. Has no electronegativity and the highest mass of the elements here.
  4. 10. A cation, when it looses its valence electrons it has three orbitals. It and its neighbor are important nutrients for the human body,
  5. 13. With 6 valence electrons, this diatomic element is breathed in every second.
  6. 14. An element with a charge of -2 and is located in the 3p orbital.
  7. 15. neither gains or loses electrons, is the building block of all organic compounds, atomic radius is smaller than Aluminim but larger than Helium
  8. 17. In the 1s¹, Non metal
  9. 18. forms neither a cation or anion naturally, and is one of the only metalloids here.
Down
  1. 1. has an average atomic mass of 9.012, Has 4 protons, 5 neutrons and 4 electrons
  2. 2. Used for batteries, 1 valence electron, metal
  3. 4. Highest 1st ionization energy, used to blow up balloons
  4. 6. Is a non-metal that forms an anion with a charge of +3 and has an average mass of 30.97.
  5. 7. Regardless of its high 1st ionization energy, its low electronegativity makes it virtually unreactive, but if energized it creates a unique glow.
  6. 9. This element has its own unique biochemical cycle! It also has high 1st ionization energy and electronegativety.
  7. 11. With the highest electronegativity this reactive element is used to produce uranium
  8. 12. Is an element with 7 valence electrons and is frequently used to treat water for us to drink and swim in.
  9. 16. has a charge of +3, forms a cation,in the 2nd period