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What is the electron configuration of an element with atomic number 20?
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What is the electron configuration of an element with atomic number 20?

User Sylvana
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Answer: D

Explanation: The correct answer is option D for Plato users

User Paul Rene
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if the atomic number is 20, this means the element is Calcium (Ca).

the electron configuration of Ca is:

[Ca]=
1s^22s^22p^63s^23p^64s^2


User Cameron Martin
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