Iodine - atomic # - 53
- chemical symbol - I
- atomic mass - 126.9
- properties - blue- black liquid that can be used to break down carbohydrates
- discovery info - bernard coutois 1811(france)
- melting point - 1113.5 degrees C
- boiling point - 184.35 C
- electron configuration - (Kr)5s2 4d10 5p5
- part of the halogens in group 5A
potassium- atomic # - 19
- chemical symbol - K
- atomic mass - 39.1
- properties - very soft , found in soil, cathches fire when in water
- discovery info - sir humphrey davy (england) 1807
- melting point - 63.25 degrees C
- boiling point - 760 degrees C
- electron configuration - (Ar) 4s1
- group 1A in the alkali metals
silicon - atomic # - 14
- chemical symbol - Si
- atomic mass - 28.1
- properties - one of the most widely used elements, found in plant life, used in steel, 2nd most abundant element
- discovery info - Jons jacob berzelius 1824 (sweden)
- melting point - 1410 degrees C
- boiling point - 2355 degrees C
- electron configuration - (Ne) 3s2 3p2
- part of group 4A in period 3
mercury
- atomic # - 80
chemical symbol - Hg - atomic mass - 200.6
- properties - the only one of 2 metals to be a liquid at room temp., can be poisonous
- discovery info - known in ancient china and hindu countries
- melting point - 38.842 degrees C
- boiling point - 356.58 degrees C
- electron configuration - (Xe) 6s2 5d9
- part of the 2b group, transition metal
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