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PT RevQs
Periodic Table Review
| Question | Answer |
|---|---|
| Who Developed the periodic table fo the elements? | Dmitri Mendeleev |
| how is the periodic table organized? | By increasing atomic number |
| What name is given to a row in the periodic table? | period |
| What name is given to a column in the periodic table? | Family or group |
| What is true of all elements in the same family? | they have the same number of electrons in their outer energy level (orbital) |
| What is true of all elements in the same period? | they have the same number of energy levels (orbitals) |
| How many periods are there in the periodic table? | 7 |
| Why are there 2 rows separated from the rest of the table? | to make it easier to fit on book pages/poster |
| Elements can be divided into what three classes? | metals, non-metals, metalloids |
| Most of the elements belong to which class of elements, metals, non-metals, or metalloids? | metals |
| As you move from left to right across a period the elements become ______ metallic. | less |
| What does malleable mean? | able to be flattened into a thin sheet |
| What does ductile mean? | Able to be pulled into a thin wire |
| Which class of elements are dull, poor conductors, and not malleable? | non-metals |
| Which class of elements shares some metal and some non-metal characteristics | metalloids |
| When writing an element symbol, the first letter is always ________ _________ | upper case |
| Pb is lead and Sn is tin. Why don't the symbols match the names for these elements? | because their symbol is based on the Greek or Latin name for the element |
| In what general area are the non-metals found on the periodic table? | the right side of the table |
| This family of elements all have one electron in thier outer level and contains the most reactive metals and | alkali metals |
| This family of elelemts contains reactive metals with 2 electrons in thier outer level | alkali earth metals |
| This family contains unreactive non-metals. They are all gases found in small quantities in the atmosphere | noble gases |
| This family contains the most reactive non-metals, they all have 7 electrons in their outer level | halogens |