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The pH range is commonly given as zero to 14, but a pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases. [2] The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. [3]
Archaic form of Phi. Phi (/ f aɪ /; [1] uppercase Φ, lowercase φ or ϕ; Ancient Greek: ϕεῖ pheî; Modern Greek: φι fi) is the twenty-first letter of the Greek alphabet.. In Archaic and Classical Greek (c. 9th to 4th century BC), it represented an aspirated voiceless bilabial plosive ([pʰ]), which was the origin of its usual romanization as ph .
In organic chemistry, the phenyl group, or phenyl ring, is a cyclic group of atoms with the formula C6H5, and is often represented by the symbol Ph (archaically φ) or Ø. The phenyl group is closely related to benzene and can be viewed as a benzene ring, minus a hydrogen, which may be replaced by some other element or compound to serve as a ...
Element symbols for chemical elements, ... Ph: Phosphorus: 15: Current symbol is P. [nb 1] Pl: ... Alchemists would typically call the metals by their planetary names ...
These symbols describe the features of a language above the level of individual consonants and vowels, that is, at the level of syllable, word or phrase. These include prosody , pitch, length , stress , intensity, tone and gemination of the sounds of a language, as well as the rhythm and intonation of speech. [ 72 ]
BEIJING/MANILA (Reuters) -The Philippines summoned China's deputy chief of mission in Manila on Tuesday to protest at what it called "aggressive actions" by Chinese naval forces against a resupply ...
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.
A top Philippine security official demanded Friday the immediate expulsion of Chinese diplomats allegedly behind a reported leak of a phone conversation between one of the diplomats and a Filipino ...