The nucleus.
More then 99% of an atoms mass is in the nucleus.
the nucleus
Inside the nucleus.
no
mass of protons + mass of neutrons
The mass of an atom is concentrated in the nucleus (protons+neutrons).
negatively charged and takes up most of the atoms space Takes up most of the atoms mass and is negatively charged
The nucleus - protons and neutrons. This applies to all atoms.
The mass numbers are given on the periodic table.
It contains Protons and Neutron's.
The sum of all Protons and Neutrons.
Isotopes.