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It is accomplished by loss of one or more electrons. The atom whose oxidation number decreases gains (receives) one or more electrons and is said to be reduced. This relation can be remembered by the following mnemonics. Leo says Ger! or Leo the lion, Ger! can be used to represent Loss of electron is oxidation; Gain of electron is reduction ...
A mnemonic to remember which way to turn common (right-hand thread) screws and nuts, including light bulbs, is "Righty-tighty, Lefty-loosey"; another is "Right on, Left off". [ 8 ] : 165 For the OSI Network Layer model P lease D o N ot T hrow S ausage P izza A way correspond to the Physical, Datalink, Network, Transport, Session, Presentation ...
At standard pressure, carbon, the lightest carbon group element, sublimes at 3825 °C. Silicon's boiling point is 3265 °C, germanium's is 2833 °C, tin's is 2602 °C, and lead's is 1749 °C. Flerovium is predicted to boil at −60 °C. [11] [12] The melting points of the carbon group elements have roughly the same trend as their boiling points ...
a Group 1 is composed of hydrogen (H) and the alkali metals. Elements of the group have one s-electron in the outer electron shell. Hydrogen is not considered to be an alkali metal as it is not a metal, though it is more analogous to them than any other group. This makes the group somewhat exceptional.
This is a list of mnemonics used in medicine and medical science, categorized and alphabetized. A mnemonic is any technique that assists the human memory with information retention or retrieval by making abstract or impersonal information more accessible and meaningful, and therefore easier to remember; many of them are acronyms or initialisms which reduce a lengthy set of terms to a single ...
The f-block columns do not have any IUPAC-approved group numbers. Neither do they have any generally recognised group numbers in common use. In general they are not often referred to (because they only have two elements each), but if a name is needed, they can be named by the first element (lanthanum group, cerium group, ..., ytterbium group).
The Roman numerals used correspond to the last digit of today's naming convention (e.g. the group 4 elements were group IVB, and the group 14 elements were group IVA). In Europe, the lettering was similar, except that "A" was used for groups 1 through 7, and "B" was used for groups 11 through 17. In addition, groups 8, 9 and 10 used to be ...
A single group can have multiple names. Subcategories. ... Group 14 element; Group 15 element; Group 16 element; Group 17 element; Group 18 element; H. Halogen; N.