The answer to this would be d. Precipitation patterns .
Answer:
El oxígeno, en concreto, tiene 2,6 electrones. Dichos electrones del oxígeno es la parte del número atómico que hace que la reacciones químicas del oxígeno sean de una manera determinada y, a su vez, distinta a la de otros elementos.
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True, to convert from moles to atoms, multiply the molar amount by Avogadro's number. To convert from atoms to moles, divide the atom amount by Avogadro's number (or multiply by its reciprocal).
They have microscopes to see small objects such as atoms and molecules