An atom of sodium has atomic number 11 how many protons are there ?

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

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.