Chapter 2, Problem 70AE

(a)

Interpretation Introduction

Interpretation: The total number of protons and electrons in the ${\text{Fe}}^{2+}$ ion needs to be determined. The formula of the simplest compound formed with ${\text{Fe}}^{2+}$ and oxide ion needs to be determined.

Concept Introduction: For a neutral atom, the atomic number is equal to the number of protons and electrons in an atom. If an atom becomes positive charge, the number of electrons decreases and if it becomes negative charge, the number of electrons increases. The oxide ion is ${\text{O}}_{}^{2-}$ that is oxygen with -2 charge. A compound formed is always neutral that is it has no charge.

(b)

Interpretation Introduction

Interpretation: The total number of protons and electrons in the ${\text{Fe}}^{3+}$ ion needs to be determined. The formula of the simplest compound formed with ${\text{Fe}}^{3+}$ and oxide ion needs to be determined.

Concept Introduction: For a neutral atom, the atomic number is equal to the number of protons and electrons in an atom. If an atom becomes positive charge, the number of electrons decreases and if it becomes negative charge, the number of electrons increases. The oxide ion is ${\text{O}}_{}^{2-}$ that is oxygen with -2 charge. A compound formed is always neutral that is it has no charge.

(c)

Interpretation Introduction

Interpretation: The total number of protons and electrons in the ${\text{Ba}}^{2+}$ ion needs to be determined. The formula of the simplest compound formed with ${\text{Ba}}^{2+}$ and oxide ion needs to be determined.

Concept Introduction: For a neutral atom, the atomic number is equal to the number of protons and electrons in an atom. If an atom becomes positive charge, the number of electrons decreases and if it becomes negative charge, the number of electrons increases. The oxide ion is ${\text{O}}_{}^{2-}$ that is oxygen with -2 charge. A compound formed is always neutral that is it has no charge.

(d)

Interpretation Introduction

Interpretation: The total number of protons and electrons in the ${\text{Cs}}^{+}$ ion needs to be determined. The formula of the simplest compound formed with ${\text{Cs}}^{+}$ and oxide ion needs to be determined.

Concept Introduction: For a neutral atom, the atomic number is equal to the number of protons and electrons in an atom. If an atom becomes positive charge, the number of electrons decreases and if it becomes negative charge, the number of electrons increases. The oxide ion is ${\text{O}}_{}^{2-}$ that is oxygen with -2 charge. A compound formed is always neutral that is it has no charge.

(e)

Interpretation Introduction

Interpretation: The total number of protons and electrons in the ${\text{S}}^{2-}$ ion needs to be determined. The formula of the simplest compound formed with ${\text{S}}^{2-}$ and aluminum ion needs to be determined.

Concept Introduction: For a neutral atom, the atomic number is equal to the number of protons and electrons in an atom. If an atom becomes positive charge, the number of electrons decreases and if it becomes negative charge, the number of electrons increases. The aluminium ion is ${\text{Al}}_{}^{3+}$ that is aluminum with +3 charge. A compound formed is always neutral that is it has no charge.

(f)

Interpretation Introduction

Interpretation: The total number of protons and electrons in the ${\text{P}}^{3-}$ ion needs to be determined. The formula of the simplest compound formed with ${\text{P}}^{3-}$ and aluminum ion needs to be determined.

Concept Introduction: For a neutral atom, the atomic number is equal to the number of protons and electrons in an atom. If an atom becomes positive charge, the number of electrons decreases and if it becomes negative charge, the number of electrons increases. The aluminium ion is ${\text{Al}}_{}^{3+}$ that is aluminum with +3 charge. A compound formed is always neutral that is it has no charge.

(g)

Interpretation Introduction

Interpretation: The total number of protons and electrons in the ${\text{Br}}^{-}$ ion needs to be determined. The formula of the simplest compound formed with ${\text{Br}}^{-}$ and aluminum ion needs to be determined.

Concept Introduction: For a neutral atom, the atomic number is equal to the number of protons and electrons in an atom. If an atom becomes positive charge, the number of electrons decreases and if it becomes negative charge, the number of electrons increases. The aluminium ion is ${\text{Al}}_{}^{3+}$ that is aluminum with +3 charge. A compound formed is always neutral that is it has no charge.

(h)

Interpretation Introduction

Interpretation: The total number of protons and electrons in the ${\text{N}}^{3-}$ ion needs to be determined. The formula of the simplest compound formed with ${\text{N}}^{3-}$ and aluminum ion needs to be determined.

Concept Introduction: For a neutral atom, the atomic number is equal to the number of protons and electrons in an atom. If an atom becomes positive charge, the number of electrons decreases and if it becomes negative charge, the number of electrons increases. The aluminium ion is ${\text{Al}}_{}^{3+}$ that is aluminum with +3 charge. A compound formed is always neutral that is it has no charge.