Valence

Chemistry, from the bonds out.

Valence — six plates of chemistry, from what an atom is made of to the ring with no fixed bonds.

NaCl · face-centred cubic · CN 6 · a = 564 pm

Soma

One neuron, one heartbeat, one hand.

Soma — six plates of anatomy, from the four chambers of the heart to a single Purkinje cell.

Purkinje cell · cerebellar cortex · ~200,000 inputs

Substrate

The parts you had to memorise.

Substrate — six plates of circuits, from a complete loop to the timer that has shipped since 1972.

Metal film · 5 band · 4.70 kΩ · 220 Ω · 1.00 MΩ

Spectra

Every element, read by its light.

Spectra — apparel and prints of the emission lines astronomers use to identify distant stars.

Balmer series · H I · 656.3 · 486.1 · 434.0 · 410.2 nm

Rotor

Machines that hold themselves up.

Rotor — drones and rotorcraft as engineering plates, proportioned the way the real machines are.

Quadrotor · X-configuration