Yes. The ammonium ion has a formula of NH4+ and has a positive charge so it is a cation.
What does Asa mean? Asa [asa] as a boys' name (also used less generally as girls' name Asa) is pronounced AY-sah. It is of Hebrew origin, and the meaning of Asa is doctor, healer. Biblical: name of the third king of Judah, who reigned for forty years. Made popular by the Puritans in the 17th century.
The word Muse comes from Latin MÅ«sa, which in turn is from Greek Mousa. In Greek dialects, this word is found in the variant forms mÅsa and moisa, and together these indicate that the Greek word comes from an original *montwa. As to the further origins of this form, a clue is provided by the name of Mnemosyne, the goddess of memory and mother of the Muses.