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WAEC Physics 2018 Paper

Question : 50

Total: 50

{}_{32}^{70}\mathrm{B}

. Determine its neutron-proton ratio

Solution:

The element B has a mass number of 70 with atomic number 32. Hence, B has 32 protons and (70-32) = 38 neutrons.

The neutron- proton ratio is 38:32 = $\; \frac{38}{32} = 1.1875$

$\approx \text{eq} 1.2$

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