Picometre (Noun)
Meaning
A metric unit of length equal to one trillionth of a meter.
Classification
Nouns denoting quantities and units of measure.
Examples
- The atomic radius of a helion atom is approximately 120 picometres and that of a naked nucleus is 2.1 picometres.
- This scanning tunnelling microscope uses adjustable probes and a resolution of up to point three picometres for precision imaging.
- An atom approximately ranges in size from one to 400 picometres dependent upon its atomic radius.
- A small atomic displacement of about five picometres produces such drastic changes that cause the transition from the rhombohedral to the orthorhombic phase.
- The X-ray diffraction data collected on this type of crystal sample shows a unit cell size of approximately point seven picometres cubed.