Yes, RESOURCE is a Scrabble word!

Letter values in Scrabble US: R 1, E 1, S 1, O 1, U 1, R 1, C 3, E 1.

Is it a valid word?

RESOURCE is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

available source of wealth; a new or reserve supply that can be drawn upon when needed
a source of aid or support that may be drawn upon when needed
the ability to deal resourcefully with unusual problems