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  2. Charge number - Wikipedia

    en.wikipedia.org/wiki/Charge_number

    The charge number in chemistry normally relates to an electric charge. This is a property of specific subatomic atoms. These elements define the electromagnetic contact between the two elements. A chemical charge can be found by using the periodic table. An element's placement on the periodic table indicates whether its chemical charge is ...

  3. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    Download as PDF; Printable version; ... The periodic table, ... and the order can shift slightly with atomic number [51] and atomic charge.

  4. Effective nuclear charge - Wikipedia

    en.wikipedia.org/wiki/Effective_nuclear_charge

    The nuclear charge; oxidation number; The screening effect of the inner shells; The extent to which the outermost electron penetrates into the charge cloud set up by the inner lying electron; In the periodic table, effective nuclear charge decreases down a group and increases left to right across a period.

  5. Periodic trends - Wikipedia

    en.wikipedia.org/wiki/Periodic_trends

    Download as PDF; Printable version; ... Mendeleev built the foundation of the periodic table. [2] ... Nuclear charge is defined as the number of protons in the ...

  6. Group (periodic table) - Wikipedia

    en.wikipedia.org/wiki/Group_(periodic_table)

    In the periodic table of the elements, each column is a group. In chemistry, a group (also known as a family) [1] is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table; the 14 f-block columns, between groups 2 and 3, are not numbered.

  7. Template:List of oxidation states of the elements - Wikipedia

    en.wikipedia.org/wiki/Template:List_of_oxidation...

    Element Negative states Positive states Group Notes −5 −4 −3 −2 −1 0 +1 +2 +3 +4 +5 +6 +7 +8 +9 Z; 1 hydrogen: H −1 +1: 1 2 helium: He 0 18

  8. List of chemistry mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_chemistry_mnemonics

    Number of consonants denotes number of oxygen atoms. Number of vowels denotes negative charge quantity. Inclusion of the word "ate" signifies that each ends with the letters a-t-e. To use this for the -ite ions, simply subtract one oxygen but keep the charge the same.

  9. Electronegativities of the elements (data page) - Wikipedia

    en.wikipedia.org/wiki/Electronegativities_of_the...

    Download as PDF; Printable version; ... Periodic table of electronegativity by Pauling scale. ... Number Symbol Name Electronegativity 1: H: hydrogen: 2.300 2: He: