Which term is the basic unit of matter?

Which term is the basic unit of matter?

• A. Quark
• B. Isotope
• C. Ion
• D. Atom

Answer: (D)

Matter is made of building blocks called atoms. An atom is the smallest unit that still has the properties of an element and can participate in chemical reactions, making it the fundamental piece of matter in everyday science. Inside the atom, a nucleus holds protons and neutrons, while electrons buzz around it. There are even smaller particles, like quarks, that make up protons and neutrons, but those are not the basic unit of matter in this context. Isotopes are just same-element atoms with different numbers of neutrons, and ions are atoms that have gained or lost electrons, giving them a charge. So, the atom best fits the idea of the basic unit of matter.

Matter is made of building blocks called atoms. An atom is the smallest unit that still has the properties of an element and can participate in chemical reactions, making it the fundamental piece of matter in everyday science. Inside the atom, a nucleus holds protons and neutrons, while electrons buzz around it. There are even smaller particles, like quarks, that make up protons and neutrons, but those are not the basic unit of matter in this context. Isotopes are just same-element atoms with different numbers of neutrons, and ions are atoms that have gained or lost electrons, giving them a charge. So, the atom best fits the idea of the basic unit of matter.