The diagram below represents a hydrogen atom. It shows one proton and one neutron in the nucleus and one electron surrounding it. Which of the diagrams below shows an atom that is not a form of hydrogen?

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.