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Download What is the charge of an atom`s nucleus if an atom has 20 protons
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1. What is the charge of an atom’s nucleus if an atom has 20 protons, 23 neutrons, and 18 electrons? _________________________________________ 2. How many total atoms are in the products in the chemical equation for photosynthesis: 6CO2 + 6H2O => C6H12O6 + 6O2 _________________________ 3. What is the Law of Conservation of Mass? _____________________________________ ________________________________________________________________________ 4. What happens to the atoms during a chemical reaction? __________________________ ________________________________________________________________________ 5. If Calcium (Ca) reacts chemically to Sulfur (S), then what is the new substance that is produced? _________________________________________________________________________ 6. The chemical formula for lithium carbonate is Li2CO3. How many atoms of each are there? ____________________________________________________________________________ –How many total atoms are there? ________________________________________________ 7. What are the 5 pieces of evidence that a chemical reaction has occurred? 8. What do elements in the same group all have in common? ______________________________ 9. What do elements in the same period all have in common? ______________________________ 10. If you wanted a different element than Chlorine to react with Sodium, what other elements would work best? _______________________________________________________________ 11. What does the number of valence electrons tell you about an element? ____________________ ______________________________________________________________________________ 12. Which group of elements on the periodic table will most likely react with Be? _______________ 13. In the space below, draw a Bohr model of Neon: 14. Which group on the periodic table is the most chemically stable? _________________________ Why? _________________________________________________________________________ ______________________________________________________________________________ 15. Which two groups on the periodic table are the most reactive? ___________________________ Why? _________________________________________________________________________ ______________________________________________________________________________ 16. What is the name of the element that has 3 valence electrons, 14 neutrons, and 3 electron shells/orbitals? _________________________________________________________________ 17. What does the number of valence electrons determine about that element? ________________ ______________________________________________________________________________ 18. What is the name of the element with 1 proton? ______________________________________ How do you know? ______________________________________________________________ 19. What is the name of the element with 101 protons? ___________________________________ How do you know? ______________________________________________________________ 20. Draw a Bohr model for Sodium: 21. Draw a Bohr model for Fluorine: 22. Draw a Bohr model that represents the chemical reaction of Hydrogen and Oxygen to make water:
