  We employ a continuum approach to the three valence-quark bound-state problem
in relativistic quantum field theory to predict a range of properties of the
proton's radial excitation and thereby unify them with those of numerous other
hadrons. Our analysis indicates that the nucleon's first radial excitation is
the Roper resonance. It consists of a core of three dressed-quarks, which
expresses its valence-quark content and whose charge radius is 80% larger than
the proton analogue. That core is complemented by a meson cloud, which reduces
the observed Roper mass by roughly 20%. The meson cloud materially affects
long-wavelength characteristics of the Roper electroproduction amplitudes but
the quark core is revealed to probes with $Q^2 \gtrsim 3 m_N^2$.
