Term
| How is todays periodic table different from Mendeleev's original? |
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Definition
It is now ordered by atomic number instead of atomic mass. |
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Term
| What are the physical properties of metals?(6) |
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Definition
| malleability, ductility, hardness, shininess, conductivity, and how magnetic they are. |
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Term
What are the chemical properties of metals? |
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Definition
| Reactivity with other metals and their corrosion rate |
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Term
| What information can the periodic table give us?(3) |
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Definition
how reactive an element is, tell which elements have similar properties, and the number of valence electrons an element has. |
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Term
| How do valence electrons affect the reactivity of elements? |
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Definition
| because they determine if an atom shares, transfers, or accepts electrons from another atom |
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Term
| How does reactivity change as we move across the periodic table? |
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Definition
| From left to right, the reactivity decreases. |
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Term
| Where are metals located on the periodic table? |
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Definition
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Term
| Where are nonmetals located on the periodic table? |
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Definition
| They are located to the right of the zig-zag line |
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Term
| Where are metalloids located on the periodic table? |
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Definition
| right between the metals and nonmetals |
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Term
| Why is atomic mass usually not a whole number? |
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Definition
| because it is an average of one mass of an element which would be small and a varying number. |
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Term
| What are properties of alkali metals? |
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Definition
| highest reactivity, soft, and shiny |
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Term
| What are the properties of alkaline earth metals? |
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Definition
| high reactivity, hard, and good conductors |
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Term
| What are the properties of transition metals? |
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Definition
| hard, shiny, and good conductors |
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Term
| How many valence electrons are in the alkali metals, alkaline earth metals, halogens, and noble gas families? |
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Definition
| 1,2,7, and 8 valence electrons |
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Term
| Which group on the periodic table contains the most elements? |
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Definition
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Term
Where is the proton located in an atom and what is its charge? |
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Definition
| in the nucleus, and + charge |
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Term
| Where is the neutron located in an atom and what is its charge? |
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Definition
| in the nucleus, no charge |
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Term
| Where is the electron located in an atom and what is its charge? |
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Definition
| outiside the atom in the shell/orbital has a - charge |
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Term
| How do you find the number of protons and neutrons in an atom? |
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Definition
| by looking at the atomic number |
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Term
| How do you find the number of neutrons in an atom? |
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Definition
| Atomic mass number- Atomic number= # of neutrons |
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Term
| How do you find the weight of an atom? |
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Definition
| Add the number of protons and neutrons together. |
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Term
| Group whose elements are similar; it's difficult to find differences between them. |
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Definition
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Term
| True or false? An element's properties can be predicted from its location un the periodic table. |
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Definition
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Term
| True of false, metals are liquid at room temperature because of their low boiling points. |
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Definition
| False, metals are solid at room temperature because of their high boiling points. |
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Term
| What are two important alkali metals? |
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Definition
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Term
| What are the important alkaline earth metals? |
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Definition
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Term
| How many nonmetals are there total? |
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Definition
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Term
| Nonmetals are _______ at room temperature because of their _______ boiling point. |
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Definition
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Term
| When metals and nonmetals react, valence electron move from the ______ atoms to the ______ atoms. |
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Definition
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Term
| What is the simplest element? |
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Definition
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