Rubidium strontium dating example profiles

Rubidium strontium dating example profiles

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This page is my section to unofficially support the chemistry radioactivity and earth science in any aqa edexcel amp ocr gcseigcse chemistry ks4 science or igcse syllabus from the following examination board syllabusesspecifications gcse private tuition residential student tuition courses pupil resources teacher resources publishing company revision guides published by amazon harper collins.

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chromium is a chemical element with symbol cr and atomic number 24 it is the first element in group 6it is a steelygrey lustrous hard and brittle metal which takes a high polish resists tarnishing and has a high melting pointthe name of the element is derived from the greek word χρῶμα chrōma meaning color because many chromium compounds are intensely colored.

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antimony is a member of group 15 of the periodic table one of the elements called pnictogens and has an electronegativity of 205 in accordance with periodic trends it is more electronegative than tin or bismuth and less electronegative than tellurium or arsenicantimony is stable in air at room temperature but reacts with oxygen if heated to produce antimony trioxide sb 2 o 3.

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