Links and Published Docs

Hello,
I have two problems:
1. The links do not open in a new tab even though I added target = “_ blank” to them.
2. I need to embed a google Docs that i have Published, but when i insert the code it disappears after i press update in the post.

code examples:
1. my link
2. <iframe src=”https://docs.google.com/spreadsheets/d/1bMte9u8pQe6KEKfG93VSlEsshRrA7vZUuid0DjZQV5k/pubhtml?widget=true&headers=false”></iframe&gt;

Can anyone help me?
Thank you
Hila