I‘m starting to learn about crystal structure and unit cells in chemistry. I‘m somewhat confused as to what types of forces between atoms play into the type of unit cell formed. Do molecular compounds in solid states have crystal structures, such as H20?How about pure non-metal elements like C? Diamonds and graphite.What about ionic compounds like Si02?And finally what about pure elements like copper?Right now we are just doing things like calculating the density of NaCl but I‘m still lost as to which types of compounds are capable of forming crystal structures in solid states, and what forces play into these structural types.
Hiring contractors for home repairs is no different than visiting a Doctor that gives you bad news, so Get several more opinions. Personally, I feel you probably have either poor flashing somewhere, or some broken tile. A good roofer can find the leak and make the repair unless you'd prefer spending around $7,500.00 to $ 10,000.00 and up to have it replaced. Good Luck to you.
Had my roof checked recently ,,, Re fixed 3 or 4 loose ridge tiles and some loose ones near edge were re fixed , Cost ?400. ,, As to whether the estate agent is right only a proper check can ascertain the exact problem Also how can you check if any work has been done ? Only by employing someone to go up there and check for you .
Hiring contractors for home repairs is no different than visiting a Doctor that gives you bad news, so Get several more opinions. Personally, I feel you probably have either poor flashing somewhere, or some broken tile. A good roofer can find the leak and make the repair unless you'd prefer spending around $7,500.00 to $ 10,000.00 and up to have it replaced. Good Luck to you.
Had my roof checked recently ,,, Re fixed 3 or 4 loose ridge tiles and some loose ones near edge were re fixed , Cost ?400. ,, As to whether the estate agent is right only a proper check can ascertain the exact problem Also how can you check if any work has been done ? Only by employing someone to go up there and check for you .
