Relatively how much more rapid is the diffusion of hydrogen gas compared to neon gas

A colourless obourless gaseous elements that gives a red Glow in a vacuum tube
A. nonmetallic univalent elements that is normal a colourless

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).