Electron configuration is defined as the description of where each electron is located, in terms of levels and sublevels around the nucleus. In this question, we have the following electron configuration:
1s2 2s2 2p6 3s2 3p6
This electron configuration has 8 electrons in its valence shell (the last number represents the shell number, in this case is 3) and according to the octet rule, this is a stabilized element, therefore it must be a Noble Gas
The period will be 3, since this is the valence shell
The group will be Noble gas, or group 18
Noble gas, usually, will not bond to other elements, since they are stabilized according to the octet rule