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andreyandreev [35.5K]
3 years ago
9

Which atom or ion is the largest? A. K B. K+ C. Ca D. Ca2+ E. Li

Chemistry
1 answer:
pishuonlain [190]3 years ago
5 0

Answer:

A. K

Step-by-step explanation:

Remember the trends in the Periodic Table:

  • Atomic radii <em>decrease</em> from left to right across a Period.
  • Atomic radii <em>increase</em> from top to bottom in a Group.
  • Ionic radii of metal cations are <em>smaller</em> than those of their atoms.

Thus, the largest atoms are in the lower left corner of the Periodic Table.

The diagram below shows that K is closest to the lower left, so it is the largest atom. It is also larger than any of the cations.

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