Almost all of an atom's mass is in the nucleus.
Since a neutron has mass, adding a neutron to an atomic nucleus increases the atom's mass.
The nucleus.
the nucleus
Inside the nucleus.
we can not add neutron
More then 99% of an atoms mass is in the nucleus.
Most of the mass of a potassium atom is located in its nucleus, which contains protons and neutrons. The electrons in the electron cloud surrounding the nucleus have significantly less mass compared to the nucleus.
The sum of all Protons and Neutrons.
The mass of an atom is concentrated in the nucleus (protons+neutrons).
Adding a neutron to an atom's nucleus increases the atom's mass by approximately 1 atomic mass unit (amu), as neutrons have a mass of about 1 amu.
The Atomic Mass number tells how many protons and neutrons are in a nucleus.
The atomic mass increase with 1 unit.