Question

Please tell me the answer of all parts

Answer 1

Answer:

Example:

\begin{tabular}{c | l}

Atomic Number & Element \\

\cline{1-2}

1 & Hydrogen \\

2 & Helium \\

3 & Lithium \\

4 & Beryllium \\

5 & Boron \\

6 & Carbon

\end{tabular