Practice worksheet for understanding valence electrons, Lewis dot structures, and ion formation.

- Hydrogen: Main e⁻ level - 1, Number of valence electrons - 1, Lewis dot structure - H•, Number of e⁻ gained - 1, Number of e⁻ lost - 0
- Lithium: Main e⁻ level - 2, Number of valence electrons - 1, Lewis dot structure - Li•, Number of e⁻ gained - 0, Number of e⁻ lost - 1
- Cesium: Main e⁻ level - 6, Number of valence electrons - 1, Lewis dot structure - Cs•, Number of e⁻ gained - 0, Number of e⁻ lost - 1
- Magnesium: Main e⁻ level - 3, Number of valence electrons - 2, Lewis dot structure - •Mg•, Number of e⁻ gained - 0, Number of e⁻ lost - 2
- Calcium: Main e⁻ level - 4, Number of valence electrons - 2, Lewis dot structure - •Ca•, Number of e⁻ gained - 0, Number of e⁻ lost - 2
- Strontium: Main e⁻ level - 5, Number of valence electrons - 2, Lewis dot structure - •Sr•, Number of e⁻ gained - 0, Number of e⁻ lost - 2
- Boron: Main e⁻ level - 2, Number of valence electrons - 3, Lewis dot structure - •B•, Number of e⁻ gained - 0, Number of e⁻ lost - 3
- Aluminum: Main e⁻ level - 3, Number of valence electrons - 3, Lewis dot structure - •Al•, Number of e⁻ gained - 0, Number of e⁻ lost - 3
- Element: Bromine, Ion symbol: Br⁻, Number of protons: 35, Number of electrons: 36, Charge: -1, Ion type: Anion
- Element: Strontium, Ion symbol: Sr²⁺, Number of protons: 38, Number of electrons: 36, Charge: +2, Ion type: Cation
- Element: Oxygen, Ion symbol: O²⁻, Number of protons: 8, Number of electrons: 10, Charge: -2, Ion type: Anion
- Element: Magnesium, Ion symbol: Mg²⁺, Number of protons: 12, Number of electrons: 10, Charge: +2, Ion type: Cation
- Element: Aluminum, Ion symbol: Al³⁺, Number of protons: 13, Number of electrons: 10, Charge: +3, Ion type: Cation
- Element: Selenium, Ion symbol: Se²⁻, Number of protons: 34, Number of electrons: 36, Charge: -2, Ion type: Anion
- Element: Lithium, Ion symbol: Li⁺, Number of protons: 3, Number of electrons: 2, Charge: +1, Ion type: Cation