Answer : This atom more likely to gain two electrons to attain stability.
Explanation :
In order to attain stability the atoms tends to have eight electrons in its valence shell which can be obtained by either by sharing of electrons of complete transfer of electrons.
The tendency of atoms to attempt to get a noble gas configuration that is eight valence electrons is said to be octet rule.
In the given image there are 16 electrons in the shell that means the element is sulfur that has 6 valence electron. In order to attain stability, it will take or gain two electrons and the result in the same electronic configuration as the argon.
Hence, this atom more likely to gain two electrons to attain stability.