The number and type of particles it emits gives rise to the type of radiation being emitted. In the case of alpha decay, a helium nucleus (two protons, and two neutrons) are emitted. This is the lowest energy radiation type, but it is none the less dangerous to human health.
This abbreviation is usually found on maps, on expense reports, and it is very common to see miles abbreviated to mi. just about any time they are referenced. You might abbreviate the word miles to mi. on a road sign or a map with directions to a destination. It is also common to see such abbreviations in headlines or newspaper titles where space is a concern. Outside of maps, business mileage reports, etc. the word is not abbreviated in general prose.
mile - definition and synonyms. Close. 90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent. Close. The thesaurus of synonyms and related words is fully integrated into the dictionary. Click on the thesaurus category heading under the button in an entry to see the synonyms and related words for that meaning.