The Element Symbol Group Period Block Atomic Number Atomic Mass

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Unit Number 1 – Fundamentals of Science P1 – Task 1a ELEMENT SYMBOL GROUP PERIOD BLOCK ATOMIC NUMBER ATOMIC MASS Sodium Na 1 3 S 11 23 Potassium K 1 4 S 19 39 Calcium Ca 2 4 S 20 40 Magnesium Mg 2 3 S 12 24 Carbon C 4 2 P 6 12 Oxygen O 6 2 P 8 16 Nitrogen N 5 2 P 7 14 Fluorine F 7 2 P 9 19 Chlorine Cl 7 3 P 17 35 Iron Fe Transition block 4 D 26 56 Hydrogen H Sits on top of group 1 1 S 1 1 Sodium S 6 3 P 16 32 The periodic table is a table that categorises and displays all of the chemical elements. It is made up of groups, periods and blocks. A group (also referred to as a family) are the columns of elements, there are 8 groups. The elements in each family have similar but not identical properties and they all have the same number of outer electrons. E.g. lithium (Li), sodium (Na), potassium (K) are all soft, white, shiny metals because they are all members of group 1. A period is each horizontal row of elements, there are 7 periods. In a period, the elements are not alike in properties, the first element in a period is always an extremely active solid, and the last element in a period is always an inactive gas. Properties change greatly across a given row. Each new period represents the next shell which electrons fill. A block is a region of the periodic, there are 4 blocks: S, D, P and F. Chemical and Physical Properties: Group 1 – the furthest left hand column containing alkaline metals. Contain 1 outer electron. They can never be found as free elements in nature and
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