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Chapter 6
The Periodic Table
| Question | Answer |
|---|---|
| What is periodic law? | when elements are arranged in order of increasing atomic # |
| What is there periodic repetition of ? | physical and chemical properties |
| What are the three most broad classification of all the element? | metals, metalloids and non-metals |
| What are some properties of metals? | 80% of elements, almost all are solids, good conductors of heat and electricity, luster, malleable and ductile |
| What are some properties of non-metals? | most are gases, the solids are brittle, poor conductors of heat and electricity |
| What are some properties of metalloids? | generally similar to metals and non-metals, properties can range between metallic and nonmetallic depending on the conditions |
| Who arranged the elements in order of increasing mass in a way that demonstrated a set of repeating properties? | Mendeleev |
| Who both created a table of elements? | Demitri Mendeelev and Lother Meyer, Mendeleev was given more credit because he published this earlier that year and better explained usefulness |
| Who identified five new elements? | Dalton and Lavoisier |
| By 1700 how many elements were identified? | 13 including gold, copper and silver |
| What does each period correspond to? | an energy level |
| Why are there more elements in higher # periods? | there are more orbitals |
Created by:
dwigmans13
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