People also ask


  • What is the trend in ionization energy from left to right?

  • Ionization energies are dependent upon the atomic radius. Since going from right to left on the periodic table, the atomic radius increases, and the ionization energy increases from left to right in the periods and up the groups. Exceptions to this trend is observed for alkaline earth metals (group 2) and nitrogen group elements (group 15).

  • What happens to ionization energy as we move across a period?

  • As we move from left to right across a period, the ionization energy of elements increases. This is due to the decrease in the size of atoms across a period. The valence electrons get closer to the nucleus of an atom as we move from left to right due to increased nuclear charge.

  • What are the factors that decrease ionization energy?

  • The second factor that decreases the ionization energy is the shielding effect due to an increasing number of shells as we move down a group. 2. Trends in ionization enthalpy across a period: As we move from left to right across a period, the ionization energy of elements increases. This is due to the decrease in the size of atoms across a period.

  • Why is the first ionization energy lower on the outermost electrons?

  • Since the outermost electrons are further away, they are less strongly attracted by the nucleus, and are easier to remove, corresponding to a lower value for the first ionization energy. From left to right across a period, more protons are being added to the nucleus, but the number of electrons in the inner, lower-energy shells remains the same.

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