Physics question for homework, easy 10pts

Posted on 2014-01-20 15:29:00 in Physics by MADISON

I'm having trouble with this question from my text book:

8. As part of a science project, a student wanted to make a scale model of a gold atom using a marble of radius 1.0cm as the nucleus. Calculate the radius of the sphere to be occupied by the electrons in this model. Use the information in Question 7 to assist your calculations.



this is Questions 7:The nucleus of a gold atom has a radius of 6.2 X ?10?^(-15)m while the atom itself has a radius of 1.3 X ?10?^(-10)m. given that the volume of a sphere is V = ?(4/3) ?r^3, determine the value of the fraction:

(volume of nucleus)/(volume of atom)



i know it's confusing :/

the back of the test book says the answer to 8 is 210m if that helps.



Please help me, thank you!!

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