The smallest units of matter made up of protons, neutrons, and electrons.
A. Cells
B. Atoms
C. Biomes
D. Molecules
B. Atoms
The correct answer is B. Atoms. Atoms are the smallest units of matter that still retain the properties and characteristics of the element they belong to. Atoms consist of protons, neutrons, and electrons.
The correct answer is B. Atoms.
Atoms are the smallest units of matter. They are composed of subatomic particles, which include protons, neutrons, and electrons. Protons have a positive charge, neutrons have no charge, and electrons have a negative charge. These particles are tightly packed together in the nucleus of an atom, with electrons orbiting around the nucleus in energy levels or shells.
To arrive at this answer, you can recall basic knowledge about the composition of matter. Understanding the structure of atoms and their subatomic particles helps us comprehend how matter is formed and functions.