Si sabe que un átomo tiene 6 electrones en el segundo nivel de energía y no tiene electrones en el tercer nivel de energía, explique cómo sabe que este átomo debe ser oxígeno y cómo se puede unir.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.

i think the answer is composed of atoms

to figure the total magnification of an image that you are viewing through the microscope is really quite simple. to get the total magnification take the power of the objective (4x, 10x, 40x) and multiply by the power of the eyepiece, (usually 10x)