Using only the periodic table, arrange the following atoms in order from largest to smallest:

Question

Question

Rank from largest to smallest. To rank items as equivalent, overlap them.

K Cs Li

Answer 1

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Answer #1

K, Cs and Li all lie in group 1 of periodic table.

Rule: Atomic radius increases as we move down a group on periodic table. This is because extra shell gets added to the atom as we move down a group.

Elements appearing from top to bottom are: Li, K, Cs

So, Cs would be largest and Li would be smallest

Answer: Cs > K > Li

Answer 2

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