Formulas para calcular:
valores de L

valores de m

número de valencia de m ​

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?