A chemical element is a substance that contains only one type of atom. If a substance contains more than one type of atom, it is a compound. An element can be a solid, liquid or gas. The smallest particle of such an element is an atom. Atoms are made up of protons, neutrons, and electrons.
DIY home installed concrete countertops cost $8-$15 per square foot for materials, running $240-$450 for a typical 30 square foot kitchen counter. Professionally built and installed concrete countertops cost $70-$100 per square foot, or $2,100-$3,000 for a typical 30 square foot kitchen counter.
1 Laminate countertops cost $7-$30 per square foot, or $210-$900 for a typical kitchen. 2  Solid surface countertops cost $40-$80 per square foot, or $1,200-$2,400 for a typical kitchen.  Tile countertops cost $1-$255 per square foot, or $30-$7,650 for a typical kitchen.