객관식
Which halogen has the highest electronegativity?
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10. Periodic Properties of the Elements
Periodic Trend: Electronegativity
객관식
Which of the following options correctly describes the general trends in electronegativity across the periodic table?
A
Electronegativity remains constant across periods but increases down a group.
B
Electronegativity increases from left to right across a period and increases from top to bottom within a group.
C
Electronegativity increases from left to right across a period and decreases from top to bottom within a group.
D
Electronegativity decreases from left to right across a period and increases from top to bottom within a group.
검증된 단계별 안내1
Understand that electronegativity is a measure of an atom's ability to attract and hold onto electrons in a chemical bond.
Recall the general trend across a period (left to right) in the periodic table: electronegativity increases because atoms have more protons, increasing the nuclear charge and attracting electrons more strongly.
Recall the general trend down a group (top to bottom): electronegativity decreases because additional electron shells increase the distance between the nucleus and the valence electrons, reducing the nucleus's pull on bonding electrons.
Compare the given options with these trends: the correct description should state that electronegativity increases from left to right across a period and decreases from top to bottom within a group.
Conclude that the correct answer is the one that matches these trends, which is: 'Electronegativity increases from left to right across a period and decreases from top to bottom within a group.'
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