Why did Rutherford propose a model for the atom with a very small nucleus containing the bulk of the mass and a positive charge?
A) because a beam of positively charged particles (alpha particles) were partially reflected by a thin gold foil
B) because a beam of positively charged particles (alpha particles) were able to penetrate by a thin gold foil
C) because a beam of negatively charged particles (beta particles) were partially reflected by a thin gold foil
D) because a beam of negatively charged particles (beta particles) were able to penetrate a thin gold foil
E) because a beam of positively charged particles (alpha particles) were completely reflected by a thin gold foil
Question 2
The most pressing issue facing the world is ________.
A) too many technological advances happening too fast
B) too many scientific discoveries challenging the ecosystem
C) a rapid global population increase
D) a shortage of fossil fuels
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Examples of four different types of cells from the body. Although each cell has a cell membrane, nuc
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A summary model of the regulation of gonadal hormones.
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