your answer is true because it is found iin the magma
Energy levels inside an atom are the specific energies that electrons can have when energy occupies specific orbitals. Electrons can be excited to higher energy levels by absorbing energy from the surroundings, an equivalent light is emitted when an electron returns from a high energy state to a lower one. Representation of this diagrammatic is known as the energy level diagram.
Sodium is in group 1 and so will form Na+. Selenium is in group XVI (6) and so will form Se2- . Thus, the compound formed, sodium selenide, will be Na2Se
The number written in front is the amount of a substance there is so like 2H2O, there would be 2 water molecules
