5. Most of the mass is concentrated in the center of atom. This tiny, dense, positively charged core called a nucleuscrosswords po yan Ng science ​

NucleusThe nucleus is the small, dense, positively charged center of an atom. It contains protons and neutrons, making up most of the atom’s mass. The nucleus controls the atom’s identity and stability by attracting electrons and keeping the atom intact.

Answered by Sefton | 2025-07-06