Mechanical waves need mediums. or else it isn't a mechanical wave
There should be 3 valence electrons surrounding the aluminum ion
Modern atomic theory is, of course, a little more involved than Dalton's theory but the essence of Dalton's theory remains valid. Today we know that atoms can be destroyed via nuclear reactions but not by chemical reactions. Also, there are different kinds of atoms (differing by their masses) within an element that are known as "isotopes", but isotopes of an element have the same chemical properties.
Many heretofore unexplained chemical phenomena were quickly explained by Dalton with his theory. Dalton's theory quickly became the theoretical foundation in chemistry.
The answer would be Rutherford inferred the existence of a dense, positively charged nucleus.
Answer:
Copper does not react with water because the oxygen in water is locked into a compound with one part oxygen and two parts hydrogen. Copper oxide is a compound from the two elements copper and oxygen. Copper in moist air slowly acquires a dull green coating (patina) because its top layer has oxidised with the air.
Explanation: