Worksheet on valence electrons for chemistry education.

A worksheet titled "Valence Electrons" with four sections: identifying valence electrons in elements, determining valence electrons using the periodic table, circling valence electrons in atomic diagrams, and filling in a table with element properties.

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1. a) 6, b) 17, c) 49, d) 20, e) 74, f) 51, g) 22, h) 50
2. a) 1, b) 8, c) 1, d) 3, e) 2, f) 7, g) 4, h) 5
3. F: Atomic number(Z) = 9, Cl: Atomic number(Z) = 17, Br: Atomic number(Z) = 35, I: Atomic number(Z) = 53
4. Fluorine: Number of Protons = 9, Number of electrons = 10; Iodine: Ion symbol = I⁻, Ion type = Anion; Sulfur: Element = S, Ion symbol = S²⁻, Ion type = Anion; Potassium: Ion symbol = K⁺, Number of Protons = 19, Number of electrons = 18; Calcium: Ion symbol = Ca²⁺, Number of Protons = 20, Number of electrons = 18, Charge = +2, Ion type = Cation

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