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Physical State of material in Sun
•At these T’s, r’s,  hydrogen will be a gas
–At high enough T, as pressure (P) increases and r increases,
you never really get a “liquid”, just a very dense gas.
•H ionization?
–On outside, H mostly neutral  (a small fraction is ionized)
•remember H ionized and Balmer lines gone only above 10,000 K
–Over most of interior, H completely ionized 
•separate electrons (e-) and protons (p+)
•Ionized gas called a “plasma”
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•No discrete “surface” – just increasing r, T, P, and “opacity”