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GHSGT Science Review

This review covers the atomic number, symbol, atomic mass, protons, electrons, and neutrons of the element Iron (Fe) within the periodic table. Understand the fundamental properties of Iron in a concise and easy-to-understand manner.

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GHSGT Science Review

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  1. GHSGT Science Review Domain 3: Structures and Properties of Matter Periodic Table Ppt #2

  2. Pre-review Questions • What is the atomic number of this element? • What is the symbol for this element? • What is the atomic mass of this element? • How many protons does an atom of this element have? Can that change? • How many electrons does an atom of this element have? Can that change? • How may neutrons does an atom of this element have? Can that change? 18 Ar 39.948

  3. Periodic Table 26 Fe 55.847 • 26 is the atomic number of the element. • Fe is the symbol for the element iron. • 55.847 is the atomic mass of the element.

  4. Atomic Number • The atomic number of an atom is ALWAYS equal to the number of protons and in a neutral atom ALWAYS equal to the number of electrons. • So a neutral atom of Iron will ALWAYS have 26 protons and 26 electrons. 26 Fe 55.847

  5. Atomic Number and Protons • Every atom of an element MUST have the same number of protons…proton number can’t change or the identity of the element changes. • Electron number (ion) and neutron number (isotope) can change without changing the identity of the substance.

  6. Atomic Mass • If you round the atomic mass of an element to a whole number it is ALWAYS equal to the number of protons + the number of neutrons. • So to determine the number of neutrons in an atom of iron round the atomic mass to 56 and subtract the number of protons (atomic number) which is 26. This atom of iron will have 30 neutrons. 26 Fe 55.847

  7. Post-review Questions • What is the atomic number of this element? • What is the symbol for this element? • What is the atomic mass of this element? • How many protons does an atom of this element have? Can that change? • How many electrons does an atom of this element have? Can that change? • How may neutrons does an atom of this element have? Can that change? 18 Ar 39.948

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