Answer:
1s2 2s2 2p6 3s2 3p6 3d6 4s2
Explanation:
Explanation:
It is the heat required to change a gram of substance from a liquid to a gas.
Hi,
I think the answer is metric.
Answer: Although the best-known cause of a mass extinction is the asteroid impact that killed off the non-avian dinosaurs, in fact, volcanic activity seems to have wreaked much more havoc on Earth's biota. Volcanic activity is implicated in at least four mass extinctions, while an asteroid is a suspect in just one. Examples, of mass extinctions are Permian extinction of marine species, and Cretaceous extinction of various species, including dinosaurs.
