GIZMOs : Element Builder - ANSWER KEY. (SE) 2022

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Gizmos : Element Builder Vocabulary: atom, atomic number, electron, electron dot diagram, element, energy level, ion, isotope, mass number, neutron, nucleus, periodic table, proton, radioactive, val... ence electrons Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. What are some of the different substances that make up a pizza? __ sauce, cheese, vegetables, and pepperoni. 2. What substances make up water? __oxygen atom and two hydrogen atoms. _________ 3. What substances make up an iron pot? __ Hydrogen and Oxygen 3. _______ 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. Water 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 the center of the atom, called the nucleus. 1. Use the arrow buttons ( ) to add protons, neutrons, and electrons to the atom. Press Play ( ). A. Which particles are located in the nucleus? __Protons and neutron_____ B. Which particles orbit around the nucleus? ______Electrons______________ 2. Turn on Show element name. What causes the element name to change? ___subtracting or adding neutrons and protons. _____________________________________________ Activity A: Subatomic particles Get the Gizmo ready:  Use the arrows to create an atom with two protons, two neutrons, and two electrons.  Turn 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 element symbol: the mass number (A), electrical charge (no number is displayed if the atom is neutral), and the atomic number (Z). [Show More]

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