hi there sharon, open the group page then click the "About" on top. you will see all names, profile pics and the date when the members joined the group. the date is something like "joined a year ago" just bring your cursor to that location and the exact date and time will pop-up.
Keeping this in consideration, can Facebook group members see my wall?
Joining a group does not change the way your privacy works on your account. If a group member was unable to see something on your Timeline before you join the group, then they will not be able to see it on your Timeline after you join the group. Joining a group does not make you friends with the group members.
How do I search for a post in a Facebook group?
To search for posts in a group:
- Go to a group and click Search this group on the left.
- Enter names or keywords that appear in the post or the comments of the post you're searching for.
- Filter search results by selecting options on the left.
How do I see groups of friends on Facebook?
To do that, go to the graph search on your Facebook page (where you would search for anything or anyone on Facebook) and type in "Groups my friends are in". Choose that option from the drop down menu. You can discover a group a particular friend has joined.