18.-Escriba el símbolo químico de : a) Sodio
g) Bario
b) Magnesio
h) Bismuto
i) Vanadio
c)) Neón
d) Estroncio
e) Yodo
j) Cobalto
k) Manganeso
1) Litio
f) Polonio
18

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.

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

Estimate the molar mass of the gas that effuses at 1.6 times the effusion rate of carbon dioxide.