Auroras are lights that appear at earth’s northern and southern poles. what is the main cause of an aurora?
a) solar wind enters earth’s atmosphere, and particles interact with ions.
b) bubbles of gas are ejected from earth’s outer crust.
c) sunlight reflects off the surface of the moon during an eclipse.
d) the northern and southern poles are cooler than the rest of earth.

100 points answer quick 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.

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

Why are people not able to scuba dive in the deep part of the ocean