Multiple Choice
Which of the following elements has the lowest electronegativity?
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10. Periodic Properties of the Elements
Periodic Trend: Electronegativity
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Which of the following elements has the lowest electronegativity?
A
N
B
O
C
Cs
D
Cl
Verified step by step guidance1
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 of electronegativity in the periodic table: it increases from left to right across a period and decreases from top to bottom down a group.
Identify the positions of the given elements on the periodic table: N (Nitrogen) and O (Oxygen) are in period 2, group 15 and 16 respectively; Cl (Chlorine) is in period 3, group 17; Cs (Cesium) is in period 6, group 1.
Since electronegativity decreases down a group and increases across a period, elements in group 1 (alkali metals) at the bottom of the periodic table have the lowest electronegativity values.
Therefore, among the given elements, Cs (Cesium), being a group 1 element far down the periodic table, has the lowest electronegativity.
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