1. As you move from left to right across the periodic table, how does atomic number change?
2. What element is located in period 3, group 13?
3. What is atomic number of the element in period 6, group 2?
4. Will the element located at period 6, group 3 have a larger or smaller atomic number than the
element in #3?
5. What is the group # and period # for oxygen (O)?
6. How will the atomic number of the element located directly to the left of oxygen compare to oxygen’s
atomic number?
7. What is the atomic number of the element in period 5, group 11?
8. What is the atomic number of the element in period 2, group 18?
9. To which group on the periodic table does copper belong?
10. To which group on the periodic table does krypton belong?
11. A mystery element is in the same period as gallium. It has a smaller atomic number than gallium and
it is highly reactive. What is the mystery element?
12. Two elements are studied. One has atomic number X and one has atomic number X- 2. It is known
that element X is an alkaline earth metal. To what group does the X-2 element belong?
13. To which group on the periodic table does magnesium belong?
14. To which group on the periodic table does bromine belong?
15. A mystery metal is in the same period as sulfur. It has a larger atomic number than sulfur and is
nonreactive. What is the mystery element?
16. Two elements are studied. One has atomic number X and one has atomic number X+2. It is known
that element X is a halogen. To what group does the X+2 element belong?
17. Lithium, sodium and potassium are in the same group of the periodic table. What do they all have in
common?
18. List two elements in each of the following classifications:
A. alkali metals
B. alkaline earth metals
C. halogens
D. noble gasses
E. transition metals
F. metalloids
19. List the properties of metals, metalloids, and non-metals below:
20. Which is more reactive, bromine or helium?
21. Which is more reactive, calcium or potassium?
22. Does the reactivity for carbon, oxygen, and nitrogen increase or decrease left to right?
23. Name two elements that would have similar properties to lithium?
24. List oxygen fluorine and sulfur in order of decreasing reactivity.
25. List rubidium, cesium, and potassium in order of increasing reactivity.
26. Which of the following would react most violently with water: Cr, K, N2, Au, or Yb?
27. Which of the following would be the best substance to use in an electrical wire: C, Ag, Si, P, or Ne?
28. Which element has one valence electron and is in period 4?
29. Which element has eight valence electrons and is in period 3?
30. Which element has six valence electrons and is in period 5?
31. Which element has three valence electrons and is in period 2?
33. Which element is part of group one but is also it’s own little group? Why?
34. Which element in family 18 is an exception to the valence electron rule and why?
35. Who developed the first modern periodic table and when?
36. Families are __________________ and periods are _____________.
37. How many valence electrons does silicon have?
38. How many valence electrons does barium have?
39. What is a semiconductor and why are they important?
40. What is the only liquid metal at room temperature?