| ISOTRON | In physics, a device for separating small quantities of isotopes (7) |
| COMB | A device for separating and dressing textile fibres (4) |
| SODDY | Chemist who developed the theory of isotopes and assisted William Ramsay in the discovery of helium (5) |
| ASTON | Nobel laureate who invented the mass spectrograph, discovered a number of isotopes and the whole-number rule (5) |
| CARBONDATING | The use of isotopes to determine age |
| IMPULSE | In physics, a force producing a finite change of momentum, described in Newton's second law (7) |
| ISOTOOE | Device for separating chemically identical species of atom (7) |
| APLANAT | In physics, a reflecting or refracting surface free from spherical aberration |
| BURETTE | Which graduated glass tube is used for dispensing small quantities of liquid (7) |
| PIPETTE | Tool for transferring small quantities of liquid (7) |
| ISOSPIN | In particle physics, a quantum number related to the strong interaction |
| TRICKSY | Cunning attempt to secure pound off small quantities of paint |
| URANIUM | This element, whose isotopes are used as fuel in nuclear reactors and nuclear weapons, was discovered by German chemist Martin Heinrich Klaproth in 1789. One pound of this material yields as much ener |
| REACTOR | Which nuclear device produces radioactive isotopes, etc (7) |
| NODE | Vertex in a graph; or, in physics, a point of minimum displacement in a standing wave (4) |
| RADIUMS | Isotopes of element #88 |
| TRIPLEA | Class for baseball's Albuquerque Isotopes |
| PHONON | In physics, a quantum of vibrational energy in a crystal lattice, induced by heat (6) |
| ENTHALPY | In physics, a thermodynamic quantity equivalent to the total heat content of a system |
| FILTER | Device for separating solid particles / impurities from a liquid / gas by passing through a porous substance |
