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t. e. In the United States, academic grading commonly takes on the form of five, six or seven letter grades. Traditionally, the grades are A+, A, A−, B+, B, B−, C+, C, C−, D+, D, D− and F, with A+ being the highest and F being lowest. In some cases, grades can also be numerical. Numeric-to-letter-grade conversions generally vary from ...

The letters were indeed originally omitted from the sample alphabet, printed in a western-style serif font, presented in Peter's edict, along with the letters з (replaced by ѕ ), и , and ф (the diacriticized letter й was also removed), but were reinstated except ѱ and ѡ under pressure from the Russian Orthodox Church in a later variant ...

The periodic table, also known as the periodic table of the elements, arranges the chemical elements into rows ("periods") and columns ("groups"). It is an organizing icon of chemistry and is widely used in physics and other sciences. It is a depiction of the periodic law, which says that when the elements are arranged in order of their atomic ...

The alphabet for Modern English is a Latin-script alphabet consisting of 26 letters, each having an upper- and lower-case form. The word alphabet is a compound of the first two letters of the Greek alphabet, alpha and beta. The alphabet originated around the 7th century to write Old English from Latin script.

A, or a, is the first letter and the first vowel of the Latin alphabet, [1] [2] used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is a (pronounced / ˈeɪ / ), plural aes. [nb 1] It is similar in shape to the Ancient Greek letter Alpha, from which it derives. [3]

Formaldehyde is an intermediate in the oxidation (or combustion) of methane, as well as of other carbon compounds, e.g. in forest fires, automobile exhaust, and tobacco smoke. When produced in the atmosphere by the action of sunlight and oxygen on atmospheric methane and other hydrocarbons, it becomes part of smog.