chloehall2269
27.10.2020 •
Chemistry
Which atom has exactly 15 protons?
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Ответ:
Phosphorus
Explanation:
Ответ:
The noble gasses are the least reactive of all elements, but the heavier ones form some molecules. Helium and neon never form molecules. They have completely filled shells with no orbitals available to make covalent bonds and have very high ionization energies so that they do not form ions.