Which of the following statements is true about the science of atoms and molecules?

We can establish a quantitative relationship between the mass and number of these particles (atoms and molecules). Other statements are not true. The true statements are:1.We cannot see, weigh and perceive the atoms and molecules through naked eye.2. It is not possible to count the number of atoms and molecules in a given mass of matter through naked eyes manually.3. Physical properties of matter can be quantitatively described using numerical values with suitable units.