1) Assinale a alternativa correta: A ligação covalente ocorre entre átomos com tendência de: A - Receber elétrons
B - Doar elétrons

2) Considere o elemento cloro formando compostos com, respectivamente, hidrogênio, Carbono, sódio e cálcio

A) Com quais elementos o cloro forma compostos covalentes ? Dê a fórmula de Lewis e estrutural desses compostos

B) Com quais desses elementos o cloro forma compostos iônicos ? Dê a fórmula de Lewis e a iônica desses compostos

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.

it means there are 3 atoms of oxygen

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.