10) What is the energy of a photon whose frequency is 2.7 X 1014 Hz?
A) 2.45x10-20)
B) 2.45x1048)
C) 17.9x10-20
D) 17.9x1048)

c

Explanation:

h = constant

f = frequency

moving the point 1 number to the right, and rounding up, leaves us with;

answer; i believe that the correct answer is (a) potassium(k)

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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