| The Atom | ||
| #1 | True or False: all elements located in the same period will have the same number of valence electrons in the outer shell | False; same group |
| #2 | In an atom the number of protons equals the number of _____ | electrons |
| #3 | Mendeleev created the first periodic table by arranging elements in order of ____ | increasing atomic mass |
| #4 | What is found in the nucleus of an atom | Protons and Neutrons |
| #5 | Atoms of the halogen family typically gain __ electron(s) when they react. | 1 electron |
| Organizing the Elements | ||
| #1 | Flourine Chlorine Bromine and Iodine are a part of which family | Halogens |
| #2 | True or false: Because bromine is a nonmetal halogen, you can predict that it is liquid at room temperature | False |
| #3 | What information in the periodic table indicates the number of protons in an atom | the elements atomic number |
| #4 | What is the atomic number of Phosphorus | 15 |
| #5 | How many neutrons are in Aluminum | 14 |
| Metals | ||
| #1 | True of False: most metals are liquid at room temperature | False |
| #2 | What does it mean if a material is ductile? | can be pulled or drawn in a long wire |
| #3 | On the periodic table the most reactive metals are found where | Group 1, first column on the left |
| #4 | What are the two most common Alkaline Earth metals | calcium and magnesium |
| #5 | If an element reacts violently with water, in which group is it likely to be found | Group 17 |
| Nonmetals, Inert Gases, Semimetals | ||
| #1 | Which group of elements share characteristics with both metals and nonmetals | semimetals |
| #2 | What is the most useful property of semi metals? | the varying ability to conduct electric current |
| #3 | The zig zag line is a major group of elements called ____ | semi metals or metalloids |
| #4 | The elements that do not ordinarily form compounds are called _____ | inert gases |
| #5 | Why would it be difficult to determine the chemical and physical properties of a newly discovered synthetic element | the elements nuclei would break apart quickly |
| Radioactive Elements | ||
| #1 | The spontaneous emission of radiation by an unstable atomic nucleus was named ______ by marie currie | radioactivity |
| #2 | What did Henri Becquerel discover? | radioactive decay |
| #3 | Radioactive isotopes called ___ can be used to detect some medical problems | tracers |
| #4 | During this process, unhealthy human cells are destroyed | radiation therapy |
| #5 | A radioactive isotope that can be followed through the steps of a chemical reaction is a(n) ______. | tracer |
| Final Question | |
| Locate the box in group 18 in the 4th period. Predict the state of matter and the chemical reactivity of the element that belongs in that box. | it is an inert gas so it is in a gas state and it does not normally react with other elements because it is stable (8 valance electrons) |