What does hydrogen and helium look like?

Answer 1

It has got different discrete line in it, way more than hydrogen's spectra. I think there are 3 violet line bunched up close together, 2 blue lines, 3 yellow/orange line and a single red line.

Answer 2

At room temperature and pressure, hydrogen is a colorless, odorless gas. Helium, in its natural state, is also a colorless, odorless gas. Both gases are invisible to the naked eye and have very low densities.

Answer 3

You cannot see, smell or taste helium. But when in a balloon, helium makes it float in air.

It is a colourless gas

Invisible.

Answer 4

helium doesn't look like anything, it is like air. helium is just gas. it is colourless.

Answer 5

Helium is a colourless, odourless, mono atomic, chemically inert noble gas

Answer 6

They are invisible.