2. Write answers on sheet of paper – 13, 16, 17, 20

3. 100 200 400 300 400 Choice1Choice 2Choice 3Choice 4 300 200 400 200 100 500 100

4. Row 1, Col 1 C Symbols are assigned to each of the elements. Some are the first letters of the element, some are not. The first letter is always capitalized, the second is lower cased. What is the symbol for carbon?

5. 1,2 11 protons Protons are the same number as the atomic number. The number of protons is equal to the amount of electrons. Protons are positive. Electrons are negative. How many protons are in an atom of sodium?

6. 1,3 Zero Neutrons Neutrons are in the nucleus with the protons. Together they equal the majority of the mass. How many neutrons are there in Hydrogen?

7. 1,4 17 Electrons Electrons are negative. They are the same number as protons. Electrons have no mass and circle the outside of the nucleus. How many electrons are in an atom of Cl?

8. 2,1 H 2 O A formula is a chemical compound. It is made of 2 or more different elements What is the formula for water?

9. 2,2 Na -1 H - 1 C - 1 O - 3 The number, the subscript indicates the ratio of atoms. How many elements are in baking soda, NaHCO 3 ?

10. 2,3 Electrons are negative. Electrons are attracted to the protons which are positive. Electrons “buzz” around the nucleus at different levels. If protons are positive, neutrons are neutral, electrons are --?

11. 2,4 Electron Cloud The electrons “buzzing” around the nucleus like a cloud. Electrons have no definite path, But stay a definite distance from the nucleus If protons and neutrons are in the nucleus, electrons are in the ------?

12. 3,1 Nucleus The nucleus is where most of the mass of an atom is. It is located in the middle of the atom. Where are the protons and neutrons in the atom?

13. 3,2 2 or more elements chemically combined A compound is different from an element because it is 2 different elements combined. An element is the same all the way through. What is a compound?

14. 3,3 14 Neutrons Atomic mass: 28 Atomic number - 14 Neutrons 14 If the atomic number is 14, and the mass is 28, the number of neutrons is -----?

15. 3,4 Valence Electrons Electrons are arranged in energy levels. The number of electrons in the outer level indicates which group or family the element belongs in. It also indicates what other elements it might bond with. What are the electrons called in the outermost shell called?

16. 4,1 Ion Atoms can lose electrons to reach equilibrium. Atoms can also lose neutrons, but never protons. What is an atom called that has more electrons?

17. 4,2 Isotope An isotope is an atom that loses neutrons. What is an atom called that has more neutrons?

18. 4,3 Periods Periods are horizontal and represents the number of energy levels of the elements in that row. What do the rows on the periodic table represent?

19. 4,4 Groups or Families - On the Periodic Table - Groups are vertical and represent the number of valence electrons in the outer energy levels. The elements in that column have the same physical properties – like a family. What do the columns on the periodic table represent?

20. 5,1 2, 8, 8, 18, 32 Electrons have a definite number in each energy level. How many electrons are in each energy level?

21. 5,2 What is the element tile for Carbon? 6 C 12 Atomic number Atomic mass Atomic symbol

22. 5,3 Must have 8 electrons to be stable. What is the rule when atoms form bonds with other atoms so their outer shell is stable?

23. 5,4 Metals, Metalloids, Nonmetals What order are the properties in on the Periodic Table? LeftStaircase Right Based on their physical propeties Metals/Nonmetals – opposites Metalloids –take on characteristics of both