charity

What percentage of a Muslim's wealth should be given to our Muslim brothers undergoing critical situation in Palestine? I mean money other than zakah. Please advise. Thank you.

Assalamu Alaikum, Recently a book  in local language stated that Zakat is imposed by the then Islamic Government. We know it as a pillar of Islam and ordained by Allah.Is there any basis about the book's statement? I have already questioned the author about the validity of his statement and awaiting his reply. Please enlighten us.allah Hafiz.ahmed.

As-salamu `alaykum. I've recently converted to Islam and I'd like to know about zakah: When to give it, how much to give, and any conditions of the charity given. Jazakum Allahu khayran.