Student Exploration: Element Builder Vocabulary: atom, atomic number, electron, electron dot diagram, element, energy level, ion, isotope, mass number,
... [Show More] neutron, nucleus, periodic table, proton, radi oactive, valence 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 Less]