Argon is a gas and, like any gas, it is neither smooth nor bumpy.
In fact it could be smooth or bumpy, it mostly depends on what foods you eat.
Smooth
Lead has a smooth texture.
They are smooth and soft.
Slimy and smooth
no
smooth as a baies foot
Streptococcus bacteria are considered smooth because they do not possess flagella or pili that create a bumpy appearance. They generally appear as smooth, round colonies when grown on agar plates.
bumpy and smooth
bumpy yet smooth.
bumpy, rugh
neither. you can get LUMPY snakes. GET IT RIGHT