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Which of these elements has an electron configuration of [Kr]5s2? barium calcium rubidium strontium
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Which of these elements has an electron configuration of [Kr]5s2?

barium
calcium
rubidium
strontium

User Gdbdable
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2 Answers

3 votes

Rubidium

  • Atomic No-37
  • Short name-Rb
  • Block belongs=s-block.
  • Period=5th period
  • Group=1st group
User Jerry Gagnon
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4 votes

Answer:

The element that has an electron configuration of [Kr]5s2 is strontium. The rest of the given choices do not answer the question above.

Answer: D

Step-by-step explanation:

User Michael McGowan
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