One mole of the elements aluminium,iron,mercury,nitrogen,copper and sodium. A mole is a unit of measurement defined as an amount of a substance that contains as many elementary entities (e.g.,atoms,molecules,ions,electrons) as there are atoms in 12 grams of pure carbon-12,the isotope of carbon with atomic weight 12. It is one of the base units in the International System of Units | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Winters, Charles D. |
Taille de l’image : | 4032 px × 6048 px |
Model Release : | Non requis |
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