A neutral atom of element Q has an atomic radius of 186 pm and a first-ionization…

CHEMISTRY · Subjective · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties

Problem

A neutral atom of element Q has an atomic radius of 186 pm and a first-ionization energy of 496 kJ mol⁻¹. When it loses one electron to form Q⁺, the ionic radius decreases to 102 pm. Identify element Q by its chemical symbol.

Related theory

Atomic and ionic radii
Classification of Elements and Periodicity in Properties
Atomic size
Periodic Trends in Physical Properties

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