Question

Given the particle diagram:. At 101.3 kPa and 298 K, which element could this diagram represent?. 1. Rn 3. Ag. 2. Xe 4. Kr

Answer 1

The particle diagram is shown in figure

As the atoms in the given diagram are closely placed to each other it means that the inter molecular forces are strong and the thermal energy of molecules is low .

When intermolecular interactions are strong and thermal energy is low the atoms or particles have a definite shape and volume

in case of gas the intermolecular forces are very low and the thermal energy of atoms is very high so they are in random motion and do not have a definite shape or volume

Now in the given examples

Rn , Xe and Kr all are noble elements and are infact noble gas

So the diagram could not be for these three

The only elements Ag (silver) is solid out of the given four elements so the particle diagram is of Ag only

Answer 2

3. Ag is the answer  .......