Choose the best: Electronic configurations — task. Science State Board, Class 9.

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Select the correct answers:

1. Krypton has how many valence electrons?

\(12\)
\(5\)
\(8\)
\(10\)

2. What charge will an atom have if it loses one electron?

\(+2\)
\(-3\)
\(-1\)
\(+1\)

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