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The rank of the ions in order of increasing size is Se²⁻, Rb⁺, Br⁻ is [tex]Rb^+ < Br^- < Se^2^-[/tex]
When an atom tends to gain electrons then it acquires a negative charge. This means that size of the atom increases.
So, the more the negative charge present on an atom more will be its atomic size. When an atom tends to lose electrons then it acquires a positive charge. This means that size of the atom decreases.
So, the more the positive charge present on an atom lesser will be its atomic size.
What is an Ion?
- Ions are atoms or molecules with a net electrical charge.
- Conventionally, the charge of an electron is thought to be negative; this charge is equal to and opposite to the charge of a proton, which is thought to be positive. Because the total number of electrons in an ion is more than the total number of protons, the net charge of an ion is not zero.
- In contrast to an anion, which is negatively charged but has more electrons than protons, a cation is an ion that is positively charged but has fewer electrons than protons.
- The electrostatic force causes opposite electric charges to be drawn towards one another, causing cations and anions to attract one another and easily form ionic compounds.
To learn more about ion with the given link
https://brainly.com/question/14658325
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