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The reactivity series is sometimes quoted in the strict reverse order of standard electrode potentials, when it is also known as the "electrochemical series". [8] The following list includes the metallic elements of the first six periods. It is mostly based on tables provided by NIST.
A mnemonic is a memory aid used to improve long-term memory and make the process of consolidation easier. Many chemistry aspects, rules, names of compounds, sequences of elements, their reactivity, etc., can be easily and efficiently memorized with the help of mnemonics.
The activity series for halogens is: [1] [2] [3] ... (Element A has replaced B in compound BC to become a new compound AC and the free element B.) Some examples are:
A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
[39] [58] This creates an analogous series in which the outer shell structures of sodium through argon are analogous to those of lithium through neon, and is the basis for the periodicity of chemical properties that the periodic table illustrates: [39] at regular but changing intervals of atomic numbers, the properties of the chemical elements ...
The other two types of decay are observed in all the elements. Lead, atomic number 82, is the heaviest element to have any isotopes stable (to the limit of measurement) to radioactive decay. Radioactive decay is seen in all isotopes of all elements of atomic number 83 or greater.
This series, and perhaps your confusion relating to the UK-US difference, is a RE-activity series, where most likely an American text book will show you an Activity series. If sodium is to be placed above potassium then what about ceasium and francium? 182.55.242.11 ( talk ) 14:17, 9 July 2011 (UTC) K is indeed more reactive than Na, which is ...
1907 — Grouping of the elements to illustrate refractivity: Runs from group 12 on the left to group 13 on the right [113] 1918 — Cherkesov: Two periodic tables: Mn in group 8 rather than group 7 [114] 1920 — Stewart's arrangement of the elements: With 14 lanthanides incorporated [115] 1934 — Romanoff's system: Combined spiral-lemniscate ...