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The top documents tagged [number of protons b]
Atoms & Elements. What is an atom? An atom is the smallest particle of an element that retains its identity in a chemical reaction. Word origin: atom
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Chp 5 pg 122. A. History of the Periodic Table 1. Mendeleev a.Wanted to organize elements by properties b.Left empty spaces for elements that hadn’t been
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24. The half-life of iodine-125 is 60 days. What fraction of iodine-125 nuclides would be left after 360 days? a. ½b.1/256thc. 1/8th d. 1/64th
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