Chemistry · Some Basic Concepts of Chemistry

What is the exact numerical value of the Avogadro constant \( \text{N}_\text{A} \) as defined in the SI system?

1. \( 6.020 \times 10^{23} \text{ mol}^{-1} \)
2. \( 6.023 \times 10^{23} \text{ mol}^{-1} \)
3. \( 6.022 \times 10^{22} \text{ mol}^{-1} \)
4. \( 6.02214076 \times 10^{23} \text{ mol}^{-1} \)