Upon analysis of a sample of thorium from a nuclear power plant, a researcher finds two isotopes: thorium-231 and thorium-234. The heavier of the two isotopes is more abundant, comprising three-fourths of the sample. Based on this information, can you conclude that this sample is typical of naturally occurring thorium?

Identify two types of chemical bonding in the source of dietary potassium

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Skills of homo sapiens were found an excavation. the skulls were preserved because the bodies were frozen. so, these fossils are (blank) fossils.the image shows the evolution of skulls beginning 2 to 3 million years ago. based on the image, modern human skulls(blank) ape skulls.