The thing inside a bell that strikes it to produce sound is called a "clapper." It is typically a metal piece that swings back and forth when the bell is rung, creating the ringing sound. The clapper is essential for the bell's function, as it directly impacts the resonance and tone produced.
A dewlap or bell
It's called a 'clapper'
There is a special bell called the soothe bell that makes your Pokemon holding it like you more. Also I think there is a berry that does the same thing.
A bike bell or a bicycle bell.
Bell is a noun.
No there is no such thing
Typically the flared end of a brass instrument (trumpet, coronet, trombone, sousaphone) is called the "bell".
bell
A striker in a bell is called a clapper. It is a small piece of metal that strikes the inner surface of the bell to produce sound when the bell is rung.
It is simply called the "Ring bell".
A door bell
clapper