Multiple Choice
Which of the following is one of the main reasons for the observed periodic trends (such as atomic radius, ionization energy, and electronegativity) across the periodic table?
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10. Periodic Properties of the Elements
Periodic Trend: Cumulative
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According to periodic trends, which element has the highest electronegativity among the following?
A
N (nitrogen)
B
F (fluorine)
C
O (oxygen)
D
Cl (chlorine)
Verified step by step guidance1
Recall that electronegativity is a measure of an atom's ability to attract and hold onto electrons in a chemical bond.
Understand the general periodic trend: electronegativity increases across a period (left to right) on the periodic table and decreases down a group (top to bottom).
Identify the positions of the given elements on the periodic table: N (period 2, group 15), O (period 2, group 16), F (period 2, group 17), and Cl (period 3, group 17).
Compare the elements in the same period: F is to the right of N and O, so it has a higher electronegativity than both.
Compare elements in the same group: F is above Cl, so F has a higher electronegativity than Cl due to being in a higher period.
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