Monoatomic ions formed from barium and selenium should be determined. Concept introduction: Metals are usually electron donors and they become cations in while non-metals are usually electrons pair acceptors, and they become anions. This is due to electronic configuration of outer shell of electron in both metals and non-metals. Metals have few electrons in the outer shell and tend to give them away to accomplish the configuration of nearby noble gas (the most stable configuration).Non-metals have few electrons in the outer shell and tend to accept to accomplish the configuration of nearby noble gas.

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Chapter 2, Problem 2.51P

Interpretation Introduction

Interpretation:Monoatomic ions formed from barium and selenium should be determined.

Concept introduction:Metals are usually electron donors and they become cations in while non-metals are usually electrons pair acceptors, and they become anions.

This is due to electronic configuration of outer shell of electron in both metals and non-metals. Metals have few electrons in the outer shell and tend to give them away to accomplish the configuration of nearby noble gas (the most stable configuration).Non-metals have few electrons in the outer shell and tend to accept to accomplish the configuration of nearby noble gas.

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