Which type of reaction is: C2H4 + 3 02 - 2 CO2 + 2 H2O

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

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.