Question

A metal with an valence shell containing less then 3 electrons with an ion 2+ charge higher ionization energy then calcuum smaller atomic radius then lithium

Answer 1

Answer: B) 242 pm, 419 kJ/mol

Explanation: Potassium is larger than calcium because it has a smaller effective nuclear charge. Because potassium is larger, less energy is required to remove an electron from it than is required to remove an electron from calcium.