What occurs when a magnesium atom becomes a magnesium ion?

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

What was bohr’s contribution to the planetary model

What is the value of the standard enthalpy of formation of an element in its most stable form?