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The third period contains eight elements: sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine and argon. The first two, sodium and magnesium, are members of the s-block of the periodic table, while the others are members of the p-block. All of the period 3 elements occur in nature and have at least one stable isotope.
- Periodic Table
Periodic table of the chemical elements showing the most or...
- Group 3 element
Production. Biological chemistry. Notes. References....
- Periodic Table
Contents. hide. (Top) Periods. Period 1. Period 2. Period 3. Period 4. Period 5. Period 6. Period 7. Period 8. See also. References. Period (periodic table) In the periodic table of the elements, each numbered row is a period. A period on the periodic table is a row of chemical elements.
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 ...
A period 3 element is an element found on the third period (row) of the periodic table. The row has eight elements sodium, magnesium, aluminium, silicon, phosphorus, sulfur, chlorine, and argon. Period 3 elements have electrons in the first three electron shells. The first and second electron shells are always full.
Grupo 3 é o Sc, Y, e Lu, Lr. O lutécio (Lu) e o laurêncio (Lr) ocupam as duas posições abaixo do ítrio. Esta variante mantém as quatorze colunas do bloco f e fragmenta os lantanídeos e actinídeos.
