We are being asked to rank the given species in order of increasing radius.
The given species are ions and a neutral atom. When ranking compounds based on their ionic radius, we have the following rules:
• The more electrons that an atom/ion possess, the bigger it is.
▪ Cations (positively charged ions) tend to be smaller than their parent atoms
Positive charge → lost electrons
▪ Anions (negatively charged ions) tend to be bigger than their parent atoms
Negative charge → gained electrons
• Comparing atoms and ions that are isoelectronic or with the same number of electrons:
Arrange the following in order of increasing radius:
O2-, F- , Ne, Rb+, Br-
Frequently Asked Questions
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 concept. If you need more Periodic Trends practice, you can also practice Periodic Trends practice problems.
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Our tutors rated the difficulty ofArrange the following in order of increasing radius:O2-, F- ...as medium difficulty.
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Based on our data, we think this problem is relevant for Professor Harris' class at UF.