Os átomos de certo elemento são constituídos cada um de 38 prótons, 50 nêutrons e 38 elétrons. Qual a opção que apresenta os valores corretos de número atômico e número de massa, respectivamente

What diagram shows the ionic compound of magnesium oxide

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.