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Study Guide
Chapter 17 Study Guide
| Question | Answer |
|---|---|
| What are Aristotle's 4 "elements"? | Air, Fire, Earth, Water |
| When did Alchemy become a real science? | In the 17th and 18th centuries |
| What are the Diatomic Elements? | H2, N2, O2, F2, Cl2, Br2, I2 |
| What did Dmitri Mendeleev do? | Arranged the elements into what eventually became the periodic table |
| What is the repetition of certain properties at regular intervals when elements were placed in order of atomic mass? | Periodicity |
| Who arranged the elements in the table in order of their increasing atomic masses? | John Newlands |
| What are metals? | Valence electrons that are not held very strongly and are easily removed |
| What are non metals? | They hold their electrons tightly, so their properties are very different from metals |
| What are horizontal rows of the periodic table called? | Periods or Series |
| What do the period number tell? | How many energy levels the element in that period have in their ground state |
| What is electron affinity? | Deals with the strength of attraction of electrons to unbounded atoms |
| Covalent bonds | Non metal/ non metal- sharing electrons |
| Ionic bonds | Metal/ non metal- giving away and taking electrons |
| Metallic bonds | Metal/ Metal- everyone shares the electrons |
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