Determination of science student teachers’ conceptions about ionization energy

Procedia Social and Behavioral Sciences
By Özmen,Haluk
“Determination of science student teachers’ conceptions about ionization energy”
Publisher: Özmen, Haluk
9
Pp. 1025-1029
2010
Determination of science student teachers’ conceptions about ionization energy
Type: Empirical
Data collection method: Test
Number of subjects, range: Large — 31 or more
Grade and age of subjects: Adult — over 18 years

  • The sodium ion will not recombine with an electron to reform the sodium atom, as its stable octet configuration would be disrupted.
  • When an electron is removed from the sodium atom, the attraction of the nucleus for the ‘lost’ electron will be redistributed among the remaining electrons in the sodium ion.
  •  Because Na+(g) has a stable octet configuration, it is more stable than Na(g) atom. The
  • second ionization energy of sodium is higher than its first because the stable octet would be disrupted.
  • The second ionization energy of sodium is greater than its first ionization energy because the same number of protons in the Na+ ion attracts one less electron, so the attraction for the remaining electrons is stronger.
  • The first ionization energy of sodium is less than that of magnesium because magnesium has a fully filled 3s sub-shell.
  • The first ionization energy of magnesium is greater than that of aluminum because the 3p electron of aluminum is further from the nucleus compared to the 3s electrons of magnesium.
  • The first ionization energy of sodium is greater than that of aluminum because the 3p electron of aluminum is further away from the nucleus compared to the 3s electron of sodium.
  •  The first ionization energy of silicon is less than that of phosphorus because the 3p sub-shell of phosphorus is half-filled.
  •  The first ionization energy of phosphorus is greater than that of sulfur because the 3p sub-shell of phosphorus is half-filled.
  • The first ionization energy of silicon is greater than that of sulfur because it becomes half-filled only if an electron is removed from sulfur atom.
  • The first ionization energy of silicon is less than that of sulfur because it becomes half-filled only if an electron is removed from sulfur atom.