Explain in terms of electron configuration why selenium and sulfur have similar chemical properties

they have the same chemical properties, because their electronic configuration ends with 6 valence electrons.

Explanation: selenium and sulphur have similar chemical properties because according to their electronic configuration, they both have the same valence electron(6). This valence electron makes them to fall under the same group. Elements in the same group tends to have similarities in their chemical properties.

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.