How many atoms of chlorine are present in 1.00 mol of chlorine gas (Cl_2)?

Calculate the total number of chlorine atoms by multiplying the number of molecules by 2, since each molecule has 2 atoms: \(\text{Number of atoms} = 2 \times 6.022 \times 10^{23}\).

Set up the multiplication to find the total atoms: \(2 \times 6.022 \times 10^{23} = 1.2044 \times 10^{24}\) atoms.