Name the element that has a full
valence shell of two electrons.

i think it's helium, but i just wanna make sure, answer this question i know people will.

Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

Will mark brainliest how many electrons can be held in the energy level n = 4?