Which element has the largest atomic radius?

\begin{tabular}{|c|c|c|c|c|c|c|c|c|c|}
\hline
& 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\
\hline
1 & H & & & & & & & He \\
\hline
2 & Li & Be & B & C & N & O & F & Ne \\
\hline
3 & Na & Mg & Al & Si & P & S & Cl & Ar \\
\hline
4 & K & Ca & Ga & Ge & As & Se & Br & Kr \\
\hline
5 & Rb & Sr & In & Sn & Sb & Te & I & Xe \\
\hline
6 & Cs & Ba & La & Hf & Ta & W & Re & Os & Ir & Pt & Au & Hg & Tl & Pb & Bi & Po & At & Rn \\
\hline
7 & Fr & Ra & Ac & Th & Pa & U & Np & Pu & Am & Cm & Bk & Cf & Es & Fm & Md & No & Lr \\
\hline
\end{tabular}

A. Beryllium (Be)
B. Strontium (Sr)
C. Magnesium (Mg)
D. Barium (Ba)



Answer :

To determine the atomic radii of the elements Beryllium (Be), Strontium (Sr), Magnesium (Mg), and Barium (Ba), we will extract the given values directly.

1. Beryllium (Be):
- The atomic radius of Beryllium (Be) is [tex]\(112\)[/tex] picometers (pm).

2. Strontium (Sr):
- The atomic radius of Strontium (Sr) is [tex]\(215\)[/tex] picometers (pm).

3. Magnesium (Mg):
- The atomic radius of Magnesium (Mg) is [tex]\(160\)[/tex] picometers (pm).

4. Barium (Ba):
- The atomic radius of Barium (Ba) is [tex]\(253\)[/tex] picometers (pm).

Thus, the atomic radii of the specified elements are:
- Beryllium (Be): [tex]\(112 \, \text{pm} \)[/tex]
- Strontium (Sr): [tex]\(215 \, \text{pm} \)[/tex]
- Magnesium (Mg): [tex]\(160 \, \text{pm} \)[/tex]
- Barium (Ba): [tex]\(253 \, \text{pm} \)[/tex]

These values provide the atomic size for each element in picometers.