Question

What is the heavy region at the centre of an atom called​

Answer 1

Answer:

atomic nucleus

Explanation:

The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.

Answer 2

Answer:

the heavy region at the centre of an atom called nucleus