A condenser mic can be the very expensive mics in a studio and it can be an electret mic. To avoid the confusion, the electret mic was called "electret condenser mic". However, that is not completely true.
Wikipedia writes: "An electret microphone is a type of condenser microphone...", but that is also not completely true.
Some people like the confusion and call them condenser mics.
10k is too low. The best resistor could be 47k to 1M.
Yes, the right pin is connected to the metal outside. That is GND.