Multiple Choice
Which of the following group 15 elements is classified as a metalloid?
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2. Atoms & Elements
Periodic Table: Representative Elements & Transition Metals
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Which property generally increases from left to right within a period on the periodic table?
A
Ionization energy decreases
B
Atomic radius
C
Electronegativity
D
Metallic character
Verified step by step guidance1
Understand the periodic trend being asked: The question is about which property generally increases from left to right across a period in the periodic table.
Recall that ionization energy generally increases from left to right because atoms hold their electrons more tightly as nuclear charge increases.
Atomic radius generally decreases from left to right because increased nuclear charge pulls electrons closer to the nucleus.
Electronegativity, which is the tendency of an atom to attract electrons in a chemical bond, generally increases from left to right due to increasing nuclear charge and decreasing atomic radius.
Metallic character decreases from left to right because elements become less likely to lose electrons and behave as metals.
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