12. Nitrogen is Nz. One molecule of nitrogen gas is made up of a. Two atoms of nitrogen
b. One atom of nitrogen and one atom of oxygen
C. One atom of nitrogen
d. Two atoms of nitrogen and one atom of oxygen

there is no correct list among the choices you've provided.

the list might look something like this:

-- baby human

-- piccolo

-- flute

-- soprano singer

-- trumpet

-- tenor singer

-- trombone

-- baritone singer

-- baritone horn

-- bass singer

-- tuba

since i had to make up the list myself, i made it easy on myself, and i didn't try to shuffle the string instruments and woodwinds into it too.

not moving. pos accel,