AT&T; A. 48% 18:37 Nuclear charge, electric field and electric force Points:4 Wh

Question

AT&T; A. 48% 18:37 Nuclear charge, electric field and electric force Points:4 What is the total charge of the thorium nucleus? (The neutral thorium atom has 90 electrons Submit Answer Tries 0/5 What is the magnitude of its electric field at a distance of 4.68x10-10 m from the nucleus? Submit Answer Tries 0/5 What is the magnitude of the force on an electron at that distance? Submit Answer Tries 0/5 What would the magnitude of the force be if the distance of the electron from the nucleus were tripled? Submit Answer Tries 0/5 This dliscussion is

Explanation / Answer

According to the concept of the electric field and charges

Given that

Number of electrons n=90 electrons

Now we find the total charge of the nucleus

Total charge Q=90*1.6*10^-19=144*10^-19 C

Now we find the electric field

The electric field E=9*10^9*144*10^-19/(4.68*10^-10)^2

=59.2*10^10 N/c

Now we find the magnitude of the force

Force F=59.2*10^10*1.6*10^-19=94.72*10^-9 N

Now we find the force

Force F=9*10^9*144*10^-19*1.6*10^-19/(3*4.68*10^-10)^2

=10.52*10^-9 N

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