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While natural strontium (which is mostly the isotope strontium-88) is stable, the synthetic strontium-90 is radioactive and is one of the most dangerous components of nuclear fallout, as strontium is absorbed by the body in a similar manner to calcium. Natural stable strontium, on the other hand, is not hazardous to health.
The earliest known grammar of a Western language is the second-century BCE Art of Grammar attributed to Dionysius Thrax, a grammar of Greek. Key stages in the history of English grammars include Ælfric of Eynsham's composition around 995 CE of a grammar in Old English based on a compilation of two Latin grammars, Aelius Donatus's Ars maior and ...
eka-names (15: 4x Mend) IUPAC temp systematic names (15; 104–118) also: E with alt name (7) symbols differ (11) subsets Mythical eka-altnames / deprecated naming controversies not-an-element after all Symbols Chemical symbol § Symbols for chemical elements irregular symbols (11) IUPAC systematic (Uxx) historical Timeline of chemical element ...
Zirkon is the German variant of these and is the origin of the English zircon. [33] Niobium (Nb) 41 Νιόβη (Niobe) Greek "snowy" mythological Named after Niobe, daughter of Tantalus in classical mythology. [22] [3] · Former name columbium from Columbia, personification of America. Molybdenum (Mo) 42 μόλυβδος (molybdos) Greek "lead ...
The first published English grammar was a Pamphlet for Grammar of 1586, written by William Bullokar with the stated goal of demonstrating that English was just as rule-based as Latin. Bullokar's grammar was faithfully modeled on William Lily's Latin grammar, Rudimenta Grammatices (1534), used in English schools at that time, having been ...
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Strontium belongs to the same periodic family as calcium (alkaline earth metals), and is metabolised in a similar fashion, preferentially targeting metabolically active regions of the bone. 89 Sr is an artificial radioisotope used in the treatment of osseous (bony) metastases of bone cancer .
A description, study, or analysis of such rules may also be known as a grammar, or as a grammar book. A reference work describing the grammar of a language is called a reference grammar or simply a grammar. A fully revealed grammar, which describes the grammatical constructions of a particular speech type in great detail is called descriptive ...