answer these questions based on 234.04360 as the atomic mass of thorium - 234. the masses for the subatomic…

answer these questions based on 234.04360 as the atomic mass of thorium - 234. the masses for the subatomic particles are given. round the mass defect to the 5th decimal place. mass of a proton: 1.00728 amu mass of a neutron: 1.00866 amu how many protons does thorium have? how many neutrons does thorium - 234 have? calculate the mass defect for the isotope thorium - 234 = amu done

answer these questions based on 234.04360 as the atomic mass of thorium - 234. the masses for the subatomic particles are given. round the mass defect to the 5th decimal place. mass of a proton: 1.00728 amu mass of a neutron: 1.00866 amu how many protons does thorium have? how many neutrons does thorium - 234 have? calculate the mass defect for the isotope thorium - 234 = amu done

Answer

Explanation:

Step1: Determine proton number

Thorium has an atomic number of 90. So, it has 90 protons.

Step2: Calculate neutron number

The mass - number of Thorium - 234 is 234. Neutron number = Mass - number - Proton number. So, neutron number = 234 - 90=144.

Step3: Calculate the sum of individual particle masses

The sum of the masses of protons and neutrons is (m_{sum}=90\times1.00728 + 144\times1.00866) [ \begin{align*} m_{sum}&=90\times1.00728+144\times1.00866\ & = 90.6552+145.24704\ &=235.90224 \end{align*} ]

Step4: Calculate mass - defect

Mass - defect (\Delta m=m_{sum}-m_{actual}), where (m_{actual} = 234.04360) amu. (\Delta m=235.90224 - 234.04360=1.85864) amu

Answer:

How many protons does Thorium have? 90 How many neutrons does Thorium - 234 have? 144 Calculate the mass defect for the isotope thorium - 234 = 1.85864 amu