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Question
When you move from left to right across a period, or row, of the periodic table which one decreases?
When you move from left to right across a period, or row, of the periodic table which one decreases?
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Solution
The correct option is E Atomic radius
When you move from left to right across a period, or row, of the periodic table, atomic radius decreases as more and more electrons are added to same energy level.
This increases the effective nuclear charge due to poor shielding.
The valence electrons are more strongly attracted by the nucleus.
Due to this, the atomic radius decreases. However, ionization energy, electron affinity and the number of valence electrons increases from left to right across a period.
Hence, the correct option is E.
When you move from left to right across a period, or row, of the periodic table, atomic radius decreases as more and more electrons are added to same energy level.
This increases the effective nuclear charge due to poor shielding.
The valence electrons are more strongly attracted by the nucleus.
Due to this, the atomic radius decreases. However, ionization energy, electron affinity and the number of valence electrons increases from left to right across a period.
Hence, the correct option is E.
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