Problem: Compare both the numbers of protons and electrons present in each to rank the following ions in order of increasing radius: As3–, Br –, K+, Mg2+.

FREE Expert Solution

(1) Check the # of electrons:

As3–  → 33 (atomic number) + 3 (charge) = 36 electrons

Br–  → 35 + 1 = 36 electrons

K → 19 - 3 = 16 electrons

Mg2+  → 12 - 2 = 10 electrons

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Problem Details

Compare both the numbers of protons and electrons present in each to rank the following ions in order of increasing radius: As3–, Br , K+, Mg2+.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Periodic Trends: Ionic Radius concept. You can view video lessons to learn Periodic Trends: Ionic Radius. Or if you need more Periodic Trends: Ionic Radius practice, you can also practice Periodic Trends: Ionic Radius practice problems.

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What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry - OpenStax 2015th Edition. You can also practice Chemistry - OpenStax 2015th Edition practice problems.