A thin glass bottle holds 25ml of liquid and has a mass of 19 grams. Identify the correct process of calculating the density?

The mass has escaped into a gas which you can not see so the law stays true.

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts