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Atomic Structure (Structure of an atom ((The nucleus is very small…
Atomic Structure
Structure of an atom
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as electrons are even smaller, most of an atom is empty space
the diameter of a nucleus can be 100,000 times less than the diameter of an atom
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Atomic and mass numbers
Atomic Number
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An atom contains equal numbers of protons and electrons. Since protons and electrons have equal and opposite charges, this means that atoms are neutral overall.
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Isotopes
Atoms of an element that have the same number of protons, but different numbers of neutrons in their nuclei are called isotopes.
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Relative atomic mass
The relative atomic mass of an element is the weighted average of the relative atomic masses of the isotopes in the element.
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