Wave Characteristics: A certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm. What is the highest frequency associated with this portion of the spectrum? (c = 3.00 × 108 m/s)
A. 1.50 × 1014 Hz
B. 7.50 × 1013 Hz
C. 7.50 × 1014 Hz
D. 7.50 × 1015 Hz
E. 1.50 × 1015 Hz
Answer: E
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By scattering alpha particles from gold, Rutherford showed the atomic nucleus to be very
A) small relative to the atom. B) massive relative to the mass of an electron. C) both of these D) neither of these
In ?- decay, the number of protons in the nucleus is
A) decreased by 1. B) decreased by 2. C) increased by 1. D) increased by 2. E) remains unchanged.