I can't find the network security key for my NETGEAR 35_5G

Netgear 35_5g is your ssid. Not your model. 

if you look on the label for your device, it should have default ssid/password on it. 

you can also go to netgear.com/support/   type in your actual model number.  It'll have install guides, manuals, and firmware.

these are very beneficial for changing settings in your router or even logging in to view your ssid/password.