| Answer | Crossword Clue |
|---|---|
| RADS | X-ray dose units |
| RAD | X-ray dose |
| RAD | X-ray dose unit |
| RADS | X-ray units |
| RADS | X-ray dosage units |
| ROENTGENS | Units of X-ray exposure |
| thulium | a malleable ductile silvery-grey element occurring principally in monazite. The radioisotope thulium-170 is used as an electron source in portable X-ray units. Symbol: Tm; atomic no: 69; atomic wt: 168.93421; valency: 3; relative density: 9.321; melting pt: 1545°C; boiling pt: 1950°C |
