![]() a) In the atomic symbol below, label each letter ( a, b, c, and d ) with: the particle(s) used to determine the letter, and how the value of each letter is determined. Using the Symbol readout box, figure out which particles affect each component of the atomic symbol. If you do well on those first 2 levels, move on the 3rd and 4th level! PART II: SYMBOL SCREEN 8. Practice applying your understanding by playing 1 st and 2 nd levels on the Game screen (the tab at the top). a) What is a rule for determining the mass number of an atom or ion? Mass = the number of protons + the number of neutrons. Click on the green + sign next to Mass to reveal the balance, then continue to play the same way you were before. Play with the simulation to discover what affects the mass number of your atom or ion. The charge of an atom is determined by the ratio of protons to electrons. b) Develop a relationship (in the form of a single sentence or equation) that can predict the charge based on the number and types of particle. Negative ions have fewer protons than electrons. Positive ions have more protons than electrons. a) Fill in the blanks below to show your results: Neutral atoms have the same number of protons and electrons. Play with the simulation to discover which particles affect the charge of an atom or ion. What is the name of the following atoms? a) An atom with 3 protons and 4 neutrons: Lithium b) An atom with 2 protons and 4 neutrons: Heleum c) An atom with 4 protons and 4 neutrons: Beryllium 5. What did you discover? Protons adding them moves from left to right on the Periodic Table 4. Play until you discover which particle(s) determine(s) the name of the element you build. You can get the atom to be stable/unstable by adjusting the number of neutrons Adding electrons will change it from a +ion to neutral atom, to ion depending on how many electrons you add Adding electrons you can only add 2 to the first orbital and 8 to the second b) What particle(s) are found in the center of the atom? Protons and neutrons 3. Adding protons changes the identity of the atom adding one moves from right to left on the Periodic Table. Responses will vary, but here is what you should see. a) List two things your group observed in the simulation. As you explore, talk about what you find. Explore the Build an Atom simulation with your group. Hit the Green Star at the top of the page to follow my store! This will allow you to receive notifications whenever I update current resources and add brand new items.1 ANSWER KEY : PART I: ATOM SCREEN Build an Atom simulation ( an atom ) 1. ⭐ BE THE FIRST TO LEARN ABOUT NEW SCIENCE RESOURCES! ⭐ ![]() Copying this product in any part and placing it on the Internet (even on a personal website) is strictly prohibited and a violation of the Digital Millennium Copyright Act (DCMA). The reproduction of this product for any other use is strictly prohibited. ❗Permission is granted to copy pages specifically for student or teacher use only by the original purchaser or licensee. This lab comes with a Google Slides version of the Student Worksheet hyperlinked in the Teacher Answer Key - this lab is designed for digital and face-to-face learning! Purchase includes the 3-page Student Worksheet (PDF), 3-page Teacher Answer Key (PDF), and 3-page Digital Student Worksheet (Google). ![]() NOTE: Simulation does NOT require Flash - Lab uses both "Atom" and "Symbol" Simulations. ⚗️Label a Periodic Table Square with it's Atomic Number & Mass Number ⚗️Explain the Relationship between Atomic Number and an Element's Position on the Periodic Table ⚗️Build Stable Atomic Models for the Elements Hydrogen - Neon ⚗️Test their Pre-Existing Knowledge Protons, Neutrons, & Electrons What are the particles that make up an atom? In this virtual lab, students will use the "Build an Atom" PhET Simulation to build multiple atomic models and identify if the models are stable and if they are positively or negatively charged. ![]()
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