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Physical and Chemical PropertiesBy: Mr. Castillo & Ms. GarciaTable of ElementsWe learned elements are a pure substance made of only one type of atom.That the table of elements is a list of elements organized by their atoms properties.Also, that elements have Groups and Periods.Now, lets learn about Chemical and Physical properties that determine how one element interacts with another.Property: characteristic that helps to define or classify a substance.

Physical Properties: any property observed without changing the substance.Certain properties increase and decrease along periods (rows); Atomic Number (protons) and Atomic Mass (Protons & Neutrons).Examples: color, mass, density, texture, dissolving, hardness, melting point, or state of matter (solid, liquid, gas, and plasma).

PropertiesPhysical Properties

Chemical Properties: a property that allows a substance to react, changing it into a new substance; determined by valence electrons.*Similar chemical properties occur down a group.Reactivity: ability of an atom/molecule to undergo a chemical reaction with other atom/molecules ;determined by valence electrons.Examples: rust, burning, gas bubbles (CO2), sunburn, and decomposing matter (food rotting).PropertiesChemical Properties

Isotopes and IonsIsotopes: Atoms of an element with different number of neutrons; Atomic Mass is different.

Ions: Atoms of an element with a different number of electrons; a charged atom (+,-).----------1Why do we need to know about properties?Properties allow us to identify an element.They help us understand how elements behave and react under various conditions.

Properties

Any Questions

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