An atom has a proton number of 8 and a mass number of 15. If it has a net charge of +2, calculate the following: Atomic number
Neutron number
Electron number. Show your working .

The crust of earth may a- continets and ocean floors. b-continents only. c-layers of sedimentary rocks and continents. d-all of the above

Which statement describes how phase changes can be diagrammed as a substance is heated? the phase is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the phase is on the x-axis. the time is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the time is on the x-axis.

What is the mass of sodium in 3 moles of sodium chloride