atoms

the atom is the basic building block of matter.

atoms combine to form molecules.

radioactive atoms decay over time, releasing energy.

scientists study atoms to understand the universe.

the atom's nucleus contains protons and neutrons.

electrons orbit the atom's nucleus.

different atoms have different numbers of protons.

the size of an atom is incredibly small.

atoms are constantly in motion.

the periodic table organizes elements by their atomic structure.

chemical reactions involve the rearrangement of atoms.

the atom's structure determines its properties.