Examine the table.

\begin{tabular}{|c|c|c|c|}
\hline
Element & \begin{tabular}{c}
Number of \\
Protons
\end{tabular} & \begin{tabular}{c}
Number of \\
Neutrons
\end{tabular} & Number of Electrons \\
\hline
bohrium [tex]$( Bh )$[/tex] & 107 & 155 & 107 \\
\hline
uranium [tex]$( U )$[/tex] & 92 & 146 & 92 \\
\hline
francium [tex]$( Fr )$[/tex] & 87 & 136 & 87 \\
\hline
seaborgium [tex]$( Sg )$[/tex] & 106 & 157 & 106 \\
\hline
\end{tabular}

Which element has the greatest atomic mass?

A. seaborgium at 157
B. bohrium at 107
C. bohrium at 214
D. seaborgium at 263



Answer :

To determine which element has the greatest atomic mass, we'll follow these steps:

1. Recall that the atomic mass of an element is the sum of the number of protons and the number of neutrons in its nucleus.
2. Use the given values to compute the atomic mass for each element by adding the number of protons and neutrons.

Let's begin the calculations for each element:

- Bohrium (Bh):
- Number of protons: 107
- Number of neutrons: 155
- Atomic mass = 107 + 155 = 262

- Uranium (U):
- Number of protons: 92
- Number of neutrons: 146
- Atomic mass = 92 + 146 = 238

- Francium (Fr):
- Number of protons: 87
- Number of neutrons: 136
- Atomic mass = 87 + 136 = 223

- Seaborgium (Sg):
- Number of protons: 106
- Number of neutrons: 157
- Atomic mass = 106 + 157 = 263

Now that we have computed the atomic masses:
- Bohrium: 262
- Uranium: 238
- Francium: 223
- Seaborgium: 263

Among these, the greatest atomic mass is 263, which corresponds to Seaborgium.

Therefore, the element with the greatest atomic mass is:
Seaborgium at 263