Answer: 37 protons, 48 neutrons, and 36 electrons.
Explanation: I assume "Revision" is Rubidium. It is atomic number 37, so it has 37 protons. It's atomic mass is 85, so it has an average of (85-37) = 48 neutrons. It has a charge of +1, so one electron of the original 37 has left.
Answer:
Molecular formula = H2O
It's molecular formula and empirical formula are same
Explanation:
Answer:
C. At some point, the land was covered in water.
Explanation:
In the diagram it shows the different fossil layers. In the bottom layers there are shells, but as you go up the fossils start changing. This shows that there used to be water there, but now it is land.
Endothermic - takes in heat from the surroundings
