Cifras significativas se refieren al número de sifras con las que se expresa una medicion​

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of c is as shown here in the image.

you need to have a picture of the atom that way we can answer it

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.