Spring 2014 What type of element do the tiles in the periodic table above represent? 1. Metals 2. Metalloids 3. Nonmetals 4. What is a row in the periodic table called? A Period 5. What does the row number tell you? How many layers of electrons there are 6. What is a column in the periodic table called? A Group or Family 7. What does each element in a group have that is the same? They have the same number of valence electrons 8. Why are the elements listed in the group they are in? Each element in a group has similar chemical and physical properties 9. Write the name for each of the following group numbers: 1=Alkali Metals 2=Alkaline Earth Metals 17=Halogens 18=Nobel Gases 10. Which group would not be reactive chemically? Why? The Nobel gases do not react well chemically because they’re valance shell is completed with 8 electrons already. They do not need any more/less to have a full valence shell. 11. List all you can about: A. Protons: Positive charge, found in the nucleus, amount= atomic number B. Electrons: Negative charge, found around the nucleus, amount= atomic number C. Neutrons: Neural charge, found in the nucleus, amount = Mass-Atomic Number 12. What happens when an atom loses electrons? Losing electrons makes atoms more positive. 13. What happens if an atom gains more electrons? Gaining electrons makes atoms more negative 14. List all you can about: Metal- conduct heat and electricity, left side periodic table, loses electron= cation (positive) Nonmetal- not conduct heat or electricity, right side periodic table, gains electron= anion (negative) Metalloid- sometimes conducts, stair step on periodic table 14. List all you can about: Halogens- Group 17, very chemically reactive, 7 valence electrons, includes F, Cl,Br, I, At, has 1- charge Nobel Gases- Group 18, not chemically reactive, 8 valence electrons Alkali Metals- Group 1, very chemically reactive=unstable, one valence electron, has 1+ charge 14. List all you can about: Atomic Mass The average mass of an element on the periodic table Atomic Number- This number equals the number of protons which also equals the number of electrons for an element on the periodic table Both are used to find the number of neutrons! 15. Drawing atoms Beryllium (Be): 4 protons, 5 neutrons, 4 electrons 4p+ 5n 15. Drawing atoms Boron (B): 5 protons, 6 neutrons, 5 electrons 5p+ 6n 15. Drawing atoms Nitrogen (N): 7 protons, 7 neutrons, 7 electrons 7p+ 7n 15. Drawing atoms Oxygen (O): 8 protons, 8 neutrons, 8 electrons 8p+ 8n 16. What are the two types of bonds that elements form and explain how each one is different? Ionic bonds: part metal (cation) part nonmetal (anion), bond is made when electrons are given/taken away Covalent bonds: only nonmetals, makes molecules, electrons are shared to make the bond 17. How do you know a physical change has happened? No new substance made Indicators 1) size 2) shape 3) state of matter 4) color 18. How do you know a chemical change has happened? Produces a new substance (Product) Atoms are being rearranged-bonds are broken and formed 1) Heat is released-EXOTHERMIC-gets hot 2) Heat is absorbed-ENDOTHERMIC-gets cold 3) Gas is released-bubbles 4) New color 5) New odor 19. What does “conservation of mass” mean? Matter can not be created or destroyed The mass you started with is what you end with! 20. How are you going to get ready for this test? What is your plan for studying/getting ready? Use my review packet, read it several times Make flash cards for vocabulary words **Try to answer the review packet questions again without looking at the answers** Have my friends quiz me as a competition game for points