Browse Questions

The first ionization energy of an element is 736 kJ per mole of atoms. An atom of this element in the ground state has a total of how many valence electrons?

$(a)\;1 \\(b)\;2 \\(c)\;3 \\ (d)\;4$

$736 kJ/mol$ is the value for Mg.
Use the Periodic Table to find Mg.
It has 2 valence electrons.
Hence b is the correct answer.