define ionization enthalpy trended of I.E . in periods and groups of period table ?
Answers
Explanation:
The higher the electronegativity of an atom, the greater its ability to attract shared electrons. The electronegativity of atoms increases as you move from left to right across a period in the periodic table. The electronegativity of atoms decreases as you move from top to bottom down a group in the periodic table.
Explanation:
Ionization energy or Ionization enthalpy of elements is defined as
the amount of energy required by an isolated gaseous atom to lose an electron in its ground state.
Losing of electrons results in cation formation.
Ionization Energy Trend in the Periodic Table
General periodic trends:
In a group, while moving from top to bottom it decreases.
It increases from left to right across a period.
1. Trends in ionization enthalpy in a group:
The first ionization enthalpy of elements decreases as we move down in a group. While moving down in a group, the atomic number increases and the number of shells also increases. Outermost electrons are far away from the nucleus and thus can be removed easily. 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.
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