Short who am I riddles

Everyone in the world break me when they speak every time. Who am I?

We are a family of 12 members. I am the second. I am also the youngest in our family. Who am I?

A father's child, a mother's child, yet no one's son. Who am I?

When you do know me about me, them I am definitely something. You will always search for me. But when you know me, I am nothing. Who am I?

I have all the knowledge you have. But I am small as your fist that your hands can hold me. Who am I?

I build bridges of silver and crowns of gold. Who am I?

I am as big as you are, but I am weightless. Who am I?

I am the biggest alphabet, as I contain the most water in the world. Who am I?

I am the building with number stories. Find me who am I?

I am there when you are quiet. I am broken when you speak. Who am I?