I am not sure if you are asking what the actual elements are or what the ingredients are. So I will answer both. (Sometimes, when you ask a question it is very important that you are as precise as possible).

Here are the ingredients for ketchup.
1 gallon cooked tomatoes
1/2 cup sugar
2 tablespoons dry mustard
1 tablespoon ground all spice
1 pint cider vinegar
3 tablespoons salt
1 tablespoon black pepper
1/2 tablespoon ground cloves

When you look at the list you will recognize that these are organic compounds with the exception of salt (inorganic).

Salt contains the elements Sodium (Na) and Chlorine (Cl).

All the other ingredients contain: Carbon (C)Hydrogen (H)Oxygen(O)Nitrogen (N) Sulfur (S) Phosphorous (P).