SCIENCE 101Unit 4 Lab Part A.>electrons and Chemical Reactions STEM Case Gizmos 57 pts (with answers)

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Unit 4 Lab Part A Electrons and Chemical Reactions STEM Case Gizmos 57 pts Please use your user name and password to login to explorelearning.com. Then look for the Electrons and Chemical Reactions... case in the list. Please put your answers in a different color than the rest of the text or lab will be returned without a grade until you do. Q1. What is your role? Q2. What evidence is found? Handbook Q3. Make some ions. A. What is a positive ion called? B. What is a negative ion called? Q4. Key Concept: Atoms use their electrons to make bonds. Q5. What kind of bonds share electrons and can be represented by a ball and stick model? Q6. (2pts)When you hit the “Transfer Electron” button, what happens to the size of each atom? Why? Continued on the next page. Q7. Key Concept: In covalent bonds, the electrons are transferred. In Ionic bonds, electrons are transferred to make oppositely charged ions that form the bond. Q8. Why are valence shells important? (Write at least one full sentence.) Q9. How did sodium and chlorine change as a result of the reaction? Q10. Why do two electrons leave Magnesium? Q11. Key Concept: Because reduction and oxidation always happen at the same time, the entire reaction is called a redox reaction (a reduction-oxidation reaction). [Show More]

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