What is the site of atp synthesis

The matrix of mitochondria in animals, and stroma of Chloroplasts in plants.

Explanation:

The process of Chemiosmosis, is the name of the sequence of reaction of movements of hydrogen ions across membranes  which leads to the ATP synthesis,  ATPs is synthesized by enzyme ATPase synthase in the stroma and matrix of chloroplasts and mitochondria respectively.

The energy for the synthesis is obtained by the Proton Motive Force, which continuously pump protons, and therefore set up its electrochemical gradients between the  thylakoid membrane or intramembranes  of  matrix/stroma respectively.

It is the energy generated from the influx of protons into the matrix/stroma that ATPase synthase used to catalysed ADP with Pi (inorganic phosphate)to give ATP in these media.

                 ADP + Pi → ATP.

Therefore, the site of production of ATP are matrix of mitochondria and stroma of chlorplasts

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6