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matter
Term | Definition |
---|---|
1. Where are transition metals located on the periodic table? | Middle / bottom |
2. Where are the least reactive elements on the periodic table? | The last period (far right) |
3. Where are the most reactive elements on the periodic table? | alkali metals (far left first period) |
4. Where are the metalloids on the periodic table? | on the zig-zag line |
5. Where are the nonmetals on the periodic table? | to the right of the zig-zag |
6. Where are the metals on the periodic table? | on the left and middle |
7. What is the smallest part of an element? | an atom |
8. What is the smallest part of a compound? | a molecule |
9. What does a period represent? | rows of similar elements (energy levels) |
10. What does a group represent? | a column of similar elements (valence elec. family) |
11. What is the definition of mass? | how much matter something has |
12. What is the Law of Conservation of Matter? | matter can not be created nor destroyed, only changed from one state to another |
13. What is the definition of density? | the amount of mater in a given area |
14. What is the formula for density? | p=m/V (usually g/mL) |
15. What are the types of physical properties? | appearance, texture, color, odor, melting point, boiling point, density, solubility, polarity, etc |
16. What are the types of chemical properties? | combustibility, reactivity, and toxicity |
17. What is the definition of melting point? | the temperature at which a solid changes to a liquid (same temp as freezing) |
18. What is the definition of combustibility? | how easily something combusts |
19. What is the definition of reactivity? | How easily it can react/combine with other elements |
20. What is the definition of boiling point? | the temperature at which a material changes from a liquid to a gas |
21. What is a solute? | something that dissolves |
22. What is a solvent? | something that dissolves something else. |
23. What is a solution? | A mix of liquids or a liquid containing a solute (homogeneous) |
24. What is a homogeneous mixture? | a mixture with a uniform composition [pure(as in even)] |
25. What is a heterogeneous mixture? | a mixture without a uniform composition (easily separated) |
26. What does the atomic number represent? | the number of protons in an atom |
27. What does the atomic mass represent? | the approximate number of protons and neutrons in an atom the mass of an atom of a chemical element |
28. What is a noble gas? | an element with a full valence shell, last group |
29. How do you find the number of neutrons? | subtract the protons from the mass number |
30. What are reactants and products? | reactants are what react and the product is what comes from the reaction. (the new substance) |