Question

In the Gold foil experiment of Geiger and Marsden, that paved the way for Rutherford's model of an atom, ~ 1.00% of the $\alpha$-particles were found to deflect at angles > ${50}^0$. If one mole of $\alpha$-particles were bombarded on the gold foil, compute the number of $\alpha$-particles that would deflect at angles less than ${50}^0$.

• A. $7.96\times {10}^{23}$
• B. $5.96\times {10}^{23}$
• C. $4.96\times {10}^{23}$
• D. $6.96\times {10}^{23}$

Answer 1

Answer: (B)

% of $\alpha$ -particles deflected more than ${50}^o$ $=$ $1$% of $\alpha$ -particles.