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Ca has 20 so 1s22s22p63s23p64s2

so it has 2

He is 1s2

so it has 2 as well

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13y ago
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14y ago

Ca = 2 in the 4s orbital He = 2 in the 1s orbital

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14y ago

Helium: 2

Carbon: 2

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14y ago

2. :]

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Q: How many electrons are in the outer shell of the Ca and He atom?
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