Mxiin7
Mxiin7 Mxiin7
  • 12-11-2021
  • Chemistry
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Please someone help WHATS the answer

Please someone help WHATS the answer class=

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kenzienschool
kenzienschool kenzienschool
  • 12-11-2021
the average atomic mass: 40.078 u
electron configuration is the long list underneath the name "calcium" on the element. it starts with 1s^2s^2
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