Question

atoms are composed of
a. protons, neutrons, and electrons.
b. positrons, neutrinos, and electrons.
c. protons, neutrinos, and electrons.
d. positrons, neutrons, and electrons.

Explanation:

Atoms are the basic units of matter, with a central nucleus made of positively charged protons and neutral neutrons, surrounded by negatively charged electrons orbiting the nucleus. Positrons are antiparticles of electrons, and neutrinos are subatomic particles not part of standard atomic structure.

Answer:

A. Protons, neutrons, and electrons.