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Question
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^40_20Ca}\]
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Solution
Geometric atomic structure of:
A = P + n
40 = 20 + n
∴ n = 40 − 20 = 20 neutrons
e = 20
Electronic arrangement 2, 8, 8, 2
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