You have rules. Thousands of them. Good for you. You have exceptions to those rules. Thousands of them. Way to go.
Ag is silver. Sure. Why wouldn't it be? And it's electron configuration is [Kr] 5s1 4d10, not [Kr] 5s2 4d9. Of course! Rules are for breaking, right? Absolutely. Hell, you keep good company, silver! Half of Period 5 breaks the rules. What's the point in having rules if you're just going to follow them? You incorrigible little imp, you! :)
Chemistry, you're a cheeky monkey and I love you.
P.S. Fuck off.