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Atoms

Across
the smallest particle of an element that retains its identity in a chemical reaction
a subatomic particle with no charge and a mass of 1 amu; found in the nucleus of an atom
any atom or group of atoms with a positive charge
the arrangement of electrons of an atom in its ground state into various orbitals around the nuclei of atoms
the total number of protons and neutrons in the nucleus of an atom
atomic number: the number of protons in the nucleus of an atom of an element
Down
a positively charged subatomic particle found in the nucleus of an atom
any atom or group of atoms with a negative charge
an atom or group of atoms that has a positive or negative charge
the specific energies an electron can have in an atom or other system
a unit of mass equal to one twelfth the mass of a carbon-12 atom
a negatively charged subatomic particle
atoms of the same element that have the same atomic number but different atomic masses due to a different number of neutrons