Homer uses 6.0 strings of Christmas lights, each string of lights uses 25.0 W, Homer leaves his Christmas lights on for 20 days straight (24/7). How much energy does Homer use?

Explain which group an element with the electron configuration 1s2 2s2 2p6 3s2 3p6 3d1 4s2 belongs to.

Anthracite is so hard and pure it is also referred to as a renewable resource metamorphic rock hot bituminous coal dirty fuel

To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?