Carbon-14 is an isotope of carbon. how does it differ from other forms of carbon?

What does the symbol (–hfus) indicate in a phase change?

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.

Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon