Como se dividen as nosas células? Charla sobre os procesos de división celular. Nivel secundaria.
Avogadro & The Mole Today, 23rd October, is Mole Day – which might put you in mind of small, furry, burrowing animals. However, they don’t even seem to have a commemorative day of any kind; we’re actually talking about the mole in chemistry, a quantity that essentially allows us to ‘count’ atoms and molecules in a more convenient way. This is a fundamental concept, and one that all chemists utilise.
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Polar-Covalent Bonds: a bond between two non-metals where the electrons are unequally shared. -Jillian Charland