Welcome to our exploration of the atom, the fundamental building block of matter!An atom is the smallest unit of matter that retains all the properties of an element.At the center of every atom is the nucleus, a tightly packed cluster of particles.The nucleus contains two types of particles: positively charged protons shown in red, and neutral neutrons shown in blue.Although the nucleus contains nearly all of the atom's mass, it occupies only a tiny fraction of the atom's total volume.To understand just how small the nucleus is compared to the whole atom, imagine a football stadium.If the entire stadium represents an atom, the nucleus would be about the size of a single pea at its center.This means that atoms are mostly empty space, with tiny particles making up just a fraction of their total volume.Now that we understand the basic structure of an atom, let's explore how electrons behave around the nucleus.
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