P = _____ N = _____ E = _____
P = _____ N = _____ E = _____
Discovered in __________ by
Discovered in __________ by
__________________________
__________________________
Important Uses:
Important Uses:
P = _____ N = _____ E = _____
P = _____ N = _____ E = _____
Discovered in __________ by
Discovered in __________ by
__________________________
__________________________
Important Uses:
Important Uses: