Thomsons model( commonly the plum pudding model) - can also be described by a watermelon cut horizontally. The red of the water melon is a positively charged cloud with the seeds representing the negatively charged electrons sprinkled through out the positive cloud.
Rutherford had a model with a dense positively charged nucleus at the center. This nucleus was encircled by negatively charged atoms.
Answer: <span>b. positive charge concentrated at the center of the atom</span>
I can't read any of it... Please type a reply comment to this comment, with the questions, and I will help you.
Using the theorem of kinetic energy
1/2mVf² - 1/2mVi²= WF + Wp, Wp=0
WF = F. AB, AB=5m and F= 40N, m=20kg
so the final kinetic is KEf= 1/2mVf² = WF =<span>F. AB= 40*5=200J
</span>
the final velocity is 1/2mVf² <span>=200, implies Vf= sqrt(20)=2sqrt(5)m/s</span>
THe loss of 2 protons and 2 neutrons (also called a helium nucleus) is defined as alpha decay.
