Not missing chrome. What you have is a coin where the chrome has been worn off by circulation.
A missing chrome nickel has all of the chrome removed so that all you see is the core.
The 5 is Machine Doubling.
Thanks for all your help coin guy , you've been a great help and machine doubling ? there are different types of doubling too? omg this hobby is gonna take a lifetime to learn wish I started sooner:)