tell me about fazans rule
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Fajans' rules were formulated in 1923 by Kazimierz Fajans. They are a method for predicting ionic vs. ... By Fajans'Rules, compounds are more likely to be ionic if: there is a small positive charge on the cation, the cation is large, and the anion is small.
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Carbon-14, the radioactive isotope of carbon used in carbon dating has a half-life of 5730 years, so it decays too fast. It can only be used to date fossils younger than about 75,000 years. Potassium 40 on the other hand has a half like of 1.25 billion years and is common in rocks and minerals.
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