Q- I wonder what the element of wall clocks is and where should I place the clocks in my house?
A- In general clocks are Wood element (because they are going and moving). So hang wall clocks where the wood element is tolerant according to your individual feng shui map. I advice you to choose for pure wood element green rectangular wall clocks.
Do not display clocks so that you can see them first thing as you enter the house. And a a wall clock should never be above a door. Good feng shui areas for clocks are kitchen, the living room, and/or a cabinet. Do not place big wall clocks in your bedroom.