Hello - newbie here; use very old Rev of Mathematica; am attempting to generate multiple random 3D spheres for molecular and/or astronomical simulations. I am familiar process for generating random "points", "lines", "polygons" and "cuboids". (see below - & attach)

rcoord := {Random[ ], Random[ ], Random[ ]}

Show[Graphics3D[ Table[Cuboid[10 rcoord], {18}] ]

However, am unfamiliar w/'commands'/methodology to produce 'spheres' of any given radius/color. I wud guess that I could use - " ParametricPlot3D[ {Cos[t]...[u]...Sin[t]...[u] ... " after the 'rcoord' input; or, possibly the " SphericalPlot3D[ r, {theta...}, {phi... ] ?? (I could probably have tried these above < time than this silly message !!!! )

Thx for any assistance.