1. Represente los modelos atómicos de los siguientes elementos químicos: C, O, Ca, Fe, Al, indicando y dibujando para cada uno la cantidad de electrones, protones, neutrones, niveles de energía, realizando la configuración electrónica de cada uno.

Two solutions of the same uv-absorbing molecule were analyzed by uv-vis spectroscopy on the same instrument using 1 cm pathlength cells. use data from the table to calculate by what percentage the concentration of solution b is compared to that of solution a.sample absorbance at 315nm a 0.45 b 0.80