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Brenda Hill

1. The energy of K shell hear the nucles is2. What are Nucleons ?3. Atomic number of an atom depends upon4. is an example for Isotone. 5. which quantum Number specify the symbol "1

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a proton or neutron.


The names of elements are also represented by unique one- or two-letter symbols. Each element has a unique number of protons. An element's atomic number is equal to the number of protons in the nuclei of any of its atoms. The mass number of an atom is the sum of the protons and neutrons in the atom.


Isotones are atomic species that share the same number of neutrons, and differ in the number of protons. Examples of isotones include carbon-12, nitrogen-13 and oxygen-14. These atoms all have six neutrons and six, seven and eight protons respectively. ... same Z (number of protons) = isotopes.


The Principal Quantum Number (n)

n can be any positive integer starting at 1, as n=1 designates the first principal shell (the innermost shell). The first principal shell is also called the ground state, or lowest energy state.

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Joan Harris
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