Atomic structure, Electron configuration and the Periodic table. Crossword

I am a structure to an atom
I am In atomic physics and quantum chemistry. I am the distribution of electrons of an atom or molecule in atomic or molecular orbitals.
I have a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties.
I have this symbol (-) and have no charge
I have this symbol (+) and have a charge
I am a positively charged central core of an atom
I can be an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
The curved path of a celestial object or spacecraft around a star, planet, or moon.
Is a chemical element with the symbol H and atomic number 1.
A chemical element with the symbol Au and atomic number 79.
I am smaller than or occurring within an atom
The system of electrons surrounding the nucleus of an atom.
The smallest particle of a chemical element that can exist.
A chemical element in the periodic table that has the symbol Hg and atomic number 80.
A chemical element with symbol Fe and atomic number of 26.