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The official chart of the IPA, revised in 2020. The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic notation based primarily on the Latin script. It was devised by the International Phonetic Association in the late 19th century as a standardized representation of speech sounds in written form.

Q, or q, is the seventeenth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is pronounced / ˈkjuː /, most commonly spelled cue, but also kew, kue and que. [1]

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]

B, or b, is the second letter of the Latin-script alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is bee (pronounced / ˈbiː / ), plural bees. [1] [2] It represents the voiced bilabial stop in many languages, including English.

Z, or z, is the 26th and last letter of the Latin alphabet, as used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its usual names in English are zed ( / ˈzɛd /) and zee ( / ˈziː / ), with an occasional archaic variant izzard ( / ˈɪzərd / ). [1]

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 ...