The Balmer series is formed by electron transitions in hydrogen that
A) are between the n = 1 and n = 3 shells.
B) end on the n = 2 shell.
C) end on the n = 1 shell.
D) begin on the n = 1 shell.
E) begin on the n = 2 shell.
Question 2
The radius of a star is 6.95 108 m, and its rate of radiation has been measured to be 5.32 1026 W. Assuming that it is a perfect emitter, what is the temperature of the surface of this star? ( = 5.67 10-8 W/m2 K4 )
A) 6.27 103 K B) 8.25 103 K C) 5.78 107 K D) 3.93 107 K E) 8.87 103 K
Electron micrograph of phage T4
Hydrogen Atom
The formed elements of blood.
Hydrogen ions control acidity
Sequence Series Arithmatic Progression Problem
Electron micrograph of mitochondrial DNA derived from the frog Xenopus laevis