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.
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.
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