What are the similar properties of silver silicon and sulfur?

With respect to properties silicon is very similar to Germanium .

No. Sulfur is a Group 16 element that reacts readily with many other elements. Argon is a Group 18 element, which means it is a noble gas and typically is unreactive.

yes, theyre masses are similar and they are both metalloids

Se (Selenium)

Not particularly. They're both nonmetals, but beyond that they don't have a whole lot in common. They're more similar to each other than either is to sodium, but that's not saying much.