Jaka liczba decyduje o masie atomu
protonów
protonów i elektronów
neutronów
protonów i neutronów

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

How far is the region from the equator or control climate

What is the effect of returning nuclear reactor cooling water back into bodies of water?