Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency

Ca and Ca⁺² have same number of protons

O₂ molecule has two covalent bonds

Fe⁺² and Fe⁺³ ions have equal number of electrons

Hydrogen can have both positive and negative valency