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Which of the following influence the size of the ionisation energy of an atom? 1 the amount of shielding by the inner electrons 2 the charge on the nucleus 3 the distance between the outer electrons and the nucleus - CIE - A-Level Chemistry - Question 32 - 2015 - Paper 1
Question 32
Which of the following influence the size of the ionisation energy of an atom? 1 the amount of shielding by the inner electrons 2 the charge on the nucleus 3 the ... show full transcript
Worked Solution & Example Answer:Which of the following influence the size of the ionisation energy of an atom? 1 the amount of shielding by the inner electrons 2 the charge on the nucleus 3 the distance between the outer electrons and the nucleus - CIE - A-Level Chemistry - Question 32 - 2015 - Paper 1
Step 1
1 the amount of shielding by the inner electrons
Answer
The amount of shielding by inner electrons plays a significant role in ionization energy. Inner electrons repel outer electrons, reducing the effective nuclear charge felt by the outer electrons. This makes it easier to remove an outer electron, thus lowering the ionization energy.
Step 2
2 the charge on the nucleus
Answer
The charge on the nucleus directly influences ionization energy. A higher positive charge in the nucleus means a stronger attraction between the nucleus and outer electrons, which generally leads to a higher ionization energy as more energy is required to remove an electron.
Step 3
3 the distance between the outer electrons and the nucleus
Answer
The distance between the outer electrons and the nucleus inversely affects ionization energy. As the distance increases, the attractive force between the nucleus and outer electrons weakens, making it easier to remove an electron and therefore decreasing the ionization energy.