Yellow is a color between green and orange
Yes, it is one of the primary colors, along with red and blue. 
It is evoked by light with a dominant wavelength of roughly 570590 nm 
Wow, that is very scientific! Yellow signifies a lot of things. It can be very cheerful but also can be a color used for warning.
Yes, It is used in painting and color printing 
I find that yellow makes me sort of agitated. I am not a big fan of yellow. I prefer blue.
Really? Yellow is secondary color made by combining red and green at equal intensity