What Element Am I?

1.         I’m the only period 5-element that exists as a gas at room temperature.

  1. After losing two electrons, I end up with just as many as Ar.
  2. You’ll find me sandwiched between a liquid and a metalloid.
  3. An alkaline earth metal, I have 1 proton for every key on a piano.
  4. I’m in the same column as other elements, but I’m not part of their group or family.
  5. I’m a common part of the atmosphere with 5 valence electrons.

 

 

 

 

 

 

 

 

  1. I was first found on the sun, and I don’t burn.
  2. When neutral, I’m the most reactive element.
  3. I’m the smallest metallic atom in group IIIa.
  4. With between 13 and 36 protons, I react very violently with water, and I form a compound of the form MOH, where M = metal.

430 goodies

 

11. Smaller than carbon’s atom, I have the highest ionization energy within my period.

  1. Lower melting than potassium, my atoms are smaller than Cs’s.
  2. Of the elements with 7 valence electrons, I am the least active, chemically-speaking.
  3. Smaller than Ca, I am capable of forming a +1 ion.
  4. I am the most electronegative element in period 4.


Answers

 

 

 

 

 

Answers

  1. Xe
  2. Ca
  3. Se
  4. Ra
  5. H
  6. N
  7. He
  8. Fr
  9. Al
  10. K
  11. Ne
  12. Rb
  13. At
  14. Sc
  15. Br