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7 March, 21:25

A neutral atom whose electron configuration is 1s² 2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶ is

a. Highly reactive

b. A noble gas

c. A positively charged ion

d. A transition metal

e. A lanthanide element

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Answers (1)
  1. 7 March, 21:36
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    Is a noble gas.

    We can count the number if eletrons and we get 54. This is the atomic Number of Xe.

    Another solution is the most external sub-layer is p with 6 electrons. That configure a noble gas
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