Aunit of matter composed of two or more atoms held together by chemical bonds

In which phase(s) do the molecules take the shape of the container?

Which metal exist in liquid state and can be cut with knife ?

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.