20 Ca :
1s², 2s², 2p⁶, 3s², 3p⁶, 4s²<span>
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Answer D
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srry the pic is not clear......
l cant see it.....
Answer:
<h3>An acid that contains more than one ionizable proton is a polyprotic acid. The protons of these acids ionize in steps. The differences in the acid ionization constants for the successive ionizations of the protons in a polyprotic acid usually vary by roughly five orders of magnitude.</h3>
