Electrons fit in the first energy level. the second and third energy levels can hold up electrons

The first shell can contain 2 electrons and the second may contain 8 the third shell can hold up to 18

A flask is waiting has the mass of 50 g then 2 g of sodium metal is added to the flask Korea gas is pumped onto the onto the flask this allows the sodium metal should react completely with Klein to produce sodium chloride the flask and sodium chloride are weighed in have a massive 55 g what is the mass of sodium chloride produce