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| A small, positively charged particle in the nucleus of an atom is called a... |
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| The central core of an atom containing protons and usually neutrons is called a... |
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| A small particle in the nucleus of the atom, with no electrical charge is called a... |
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| A tiny, negatively charged particle that moves around the nucleus of an atom is called an... |
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| The number of protons in the nucleus of an atom is called an... |
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| An atom with the same number of protons and a different number of neutrons from other atoms of the same element is called an... |
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| The sum of protons and neutrons in the nucleus of an atom is called a... |
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| In science, a diagram, a mental picture, a mathematical statement, or an objct that helps explain ideas about the natural world is called a... |
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