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6 electrons

From the inside out, two, eight and eight.

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16y ago
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5mo ago

The first electron shell can hold up to 2 electrons, the second shell can hold up to 8 electrons, and the third shell can hold up to 18 electrons. Therefore, a total of 28 electrons are needed to fill the first three electron shells.

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13y ago

The number of electrons in any given shell can be represented by 2n2, where n = the shell number. In the first shell, there can be 2 electrons.

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10y ago

28 electrons can fit in the first 3 shells

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12y ago

2 + 8 + 18 = 28

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7y ago

first shell 2. second and third shell 8.

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Q: How many electrons are needed to fill the first three electron shells?
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