1. Which organisation is known for standardizing chemical nomenclature?
2. Which of the following is NOT a method for determining the empirical formula of a compound?
3. what is \({\frac{1}{12}}^{\text{th}}\) of the mass of a single atom of Carbon-12?
4. What is the name of the \(119^{\text{th}}\) element of the modern periodic table?
5. What is the SI unit of concentration?