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A neutral lithium atom has 3 electrons, the same as the number of protons, which is the atomic number of lithium. There is no lithium ion with a charge of 7+. If you mean lithium with a mass number of 7, the number of protons is 3 and the number of neutrons is 4.

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11y ago
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12y ago

37Li has 4 neutrons.

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Q: How many electrons does lithium 7 have?
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