20.efine the following terms
@ Atomic number
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✓✓✌️♥️⭐❄️✨atomic number. The definition of an atomic number is the number of protons in the nucleus of an atom of an element. Three for lithium and 20 for calcium are each an example of an atomic number.♥️✌️⭐❄️✨✓✓
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The number of protons in the nucleus of an atom which determines the chemical process of an element and it's place in the periodic table.
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