Question

Almost all the mass of an atom is concentrated in a small region of space called the __________________. Fill in the blank.

Answer 1

The total number of portions and neutrons in the nucleus of an atom is known as Mass Number/Neucleon.Almost all the mass of an atom is concentrated in a small region of space called the Nucleus 3. The particle of an atom has no charge is Neutron.

I hope this will help u .
Make this answer as brainliest

Answer 2

Dear Student,

◆ Answer -

Almost all the mass of an atom is concentrated in a small region of space called the nucleus.

● Structure of an atom -

• Atom is considered to be fundamental (yet divisible) unit of matter.
• Each atom contains protons & neutrons in the heavy nucleus and electrons revolving around nucleus in specific orbits.
• Nucleus (due to protons) is positively charged while periphery (due to electrons) is negatively charged.
• This electrons can get excited to higher orbit by absorbing energy

Thank dear.