Classifying compounds as ionic or covalent
If a compound is made from a metal and a non-metal, its bonding will be ionic.
If a compound is made from two non-metals, its bonding will be covalent.
The answer is A, hope it helps!
Water is not found on the periodic table because it does not consist of a single element.
I very much Disagree. The esophagus runs from your mouth to your stomach.