Rutherford\'s experiment with alpha particle scattering by gold foil established
ID: 1004347 • Letter: R
Question
Rutherford's experiment with alpha particle scattering by gold foil established that:
A) protons are not evenly distributed throughout an atom
B) protons are 1840 times heavier than electrons
C) electrons have a positive charge
D) electrons have a negative charge
E) atoms are made of protons, neutrons, and electrons
When a beam of alpha particles passes between two electrically charged plates, the beam is deflected toward the positive plate.
A) true
B) false
Boron oobtained from borax deposits in Death Valley consists of two isotopes. They are boron -10 and boron -11 with atomic masses of 10.013 amu and 11.009 amu, respectively. The atomic mass of boron is 10.81 amu (see periodic table). Which isotope of boron is more abundant, boron-10 or boron-11?
A) boron-11
B) boron-10
C) cannot be determined from data given
D)neither, their abudances are the same.
Explanation / Answer
1 - (a)
When alpha particles bombarded on gold foil, some passes through and some deflected backwards and he concluded that protons are not evenly distributed but is present at a dense nucleus.
2 - (b)
It is a false statement as alpha particles are positively charged and hece the beam will deflect towards negatively charged plate.
3 - (a)
The atomic mass 10.81 amu is closer to 11.009 amu. Therefore, the abundance of boron 11 is more.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.