What is the basic unit of an element that maintains its properties?

What is the basic unit of an element that maintains its properties?

• A. Atom
• B. Molecule
• C. Electron
• D. Nucleus

Answer: (A)

An atom is the smallest unit of an element that keeps the element’s characteristic properties. It carries a nucleus with protons and neutrons, surrounded by electrons in orbit. The element’s identity comes from the number of protons in the nucleus (its atomic number), while the electrons around it largely determine how the atom will react and bond with others. A molecule is just a group of atoms bonded together and can be made of the same element or different ones, so it’s not the basic unit that defines an element. The nucleus is the center of the atom, not the unit that preserves the element’s properties, and the electron is a subatomic particle that helps with bonding but doesn’t by itself define the element.

An atom is the smallest unit of an element that keeps the element’s characteristic properties. It carries a nucleus with protons and neutrons, surrounded by electrons in orbit. The element’s identity comes from the number of protons in the nucleus (its atomic number), while the electrons around it largely determine how the atom will react and bond with others. A molecule is just a group of atoms bonded together and can be made of the same element or different ones, so it’s not the basic unit that defines an element. The nucleus is the center of the atom, not the unit that preserves the element’s properties, and the electron is a subatomic particle that helps with bonding but doesn’t by itself define the element.