A 2D scientific diagram on a dark blue background showing an orange nucleus, a top blue electron, a bottom blue electron, and a blue looped path with arrows.

A 2D scientific cross-section diagram on a dark navy blue background. The image shows a small, glowing orange sphere (the nucleus) at the exact center. Above the nucleus, at the very top of the image, is a bright blue-white dot labeled "Top Electron." Below the nucleus, at the very bottom, is a second bright blue-white dot labeled "Bottom Electron." The main focus of the image is a single, thick, unbroken blue line that traces a complete vertical loop. The line starts at the top of the image, goes straight down through the top electron, passes through the center of the nucleus, goes straight down through the bottom electron, and then curves around and loops back up to the top on both the left and right sides. The line should have arrowheads placed along it to show direction. The arrowheads on the left side of the loop should point upwards, and the arrowheads on the right side of the loop should also point upwards. No arrows should point into the electrons. The overall style is a clean, schematic, textbook-style diagram with simple, clear lines. --no arrows pointing into electrons, no static arrows, no photorealistic style, no 3D rendering, no shadows, no complex backgrounds. Ver mais