View allAll Photos Tagged elements
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Name: Promethium
Symbol: Pm
Atomic Number: 61
Standard Atomic Weight: 145
Electron Configuration: 2, 8, 18, 23, 8, 2
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Name: Praseodymium
Symbol: Pr
Atomic Number: 59
Standard Atomic Weight: 140.90766
Electron Configuration: 2, 8, 18, 21, 8, 2
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It was also cold to someone like me who lives in Phoenix and thinks 60 is a bit chilly. The sun was getting a little low, we were coming back from Christmas Tree Hunting. When it's three women and on guy, let's just say we couldn't decide on a tree that day.
I pulled off on the east side of the road and drove about half a mile into to middle of this stand of trees. I was loosing light quickly so I bracketed 3 shots. I was using Fujicchrome 100 and I shot using the old Sunny 16 rule. That is 1/125 sec at F-16, then F-11 and last one at F-22. I was using a Canon F-1 with a Tokina 28-135 lens.