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LUCA SHIPOSH Element Builder Gizmo

Explore atoms with the Element Builder Gizmo! Learn how adding protons, neutrons, and electrons changes an atom’s identity, structure, charge. Discover how protons define the element and electrons orbit the nucleus. Great intro to atomic structure

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    Gizmos Date: sept 2S Name luca shiposh Student Exploration: Element Builder Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: atom, atomic number, electron, electron dot diagram, element, energy level, ion, isolope, mass number, neutron, nucleus, periodic table, proton, radioactive, valence electrons Prior Knowledge Questions (Do these BEFORE using lhe Gizmo.) dough, lomalo sauce and cheese hydrogen and oxygen iron 1. Whal are some of lhe different substances that make up a pizza? 2. Whal substances make up water? 3. Whal substances make up an iron pot? Elements are pure substances that are made up of one kind of atom. Pizza is not an element because it is a mixture of many substances. Waler is a pure substance, but it contains two kinds of atom: oxygen and hydrogen. Iron is an element because it is composed of one kind of atom. Gizmo Warm-up Atoms are tiny particles of matter that are made up of three particles: protons, neutrons, and electrons The Element Builder Gizmo shows an atom with a single proton. The proton is located in lhe center of the atom, called lhe nucleus 1. Use the arrow buttons ( » ) Io add proIons, neutrons, and electrons to the atom. Press Play ( ). A. Which particles are located in the nucleus? neutrons B Which particles orbit around the nucleus? electrons G. Turn on Show element name What causes the element name to change? proIons

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    Activity A: r - Get lhe Gizmo ready: • Use the arrows to create an alom with Iwo proIons. Subatomic particles two neutrons, and two electrons. • Tum on Show element name. Question: What are the properties of protons, neutrons, and electrons? 1. Observe: Turn on Show element symbol and Element notation. Three numbers surround the elemenl symbol: lhe mass number (A), electrical charge (no number is displayed if the alom is neutral), and lhe atomic number (Z). 2. Investigate: Watch how the numbers change as you add or remove particles. A. Which number is equal to lhe number of protons in lhe alom? atomic number B. How can you calculate the number of neulrons in an atom? lhe mass number subtracted by lhe atomic number C. Which particle (proton, neutron, or electron) has a Positive charge? neulrons Negative charge? protons No charge al all? electrons 3. Analyze: An isotope is an alternative form of an elemenl. Each isotope of an element has lhe same number of proIons, but a different number of neutrons. The isotope is represented by the atomic symbol and mass number, such as He-4. Some isotopes are stable, while others are radioactive, which means lhe atoms decay over time and emit radiation. A. B. C. What are the stable isolopes of carbon? What are the stable isolopes of nitrogen? List two radioactive isotopes of oxygen: carbon-13 carb on -12 oxygen-18 deuterium, isotopes of nitrogen and oxygen-16 nitrogen 15 and nitrogen 14 and carbon 14 oxygen-14 oxygen-13 4. Practice: Use lhe Gizmo to answer the following questions. A. How many electrons are in a neutral atom of lithium? B. How many neutrons are in an alom of Mg-25? C. What is the mass number of an alom with 5 protons and 7 neutrons? 3 13 12

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