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16 Cards in this Set
- Front
- Back
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how did mendeleev arrange the periodic table?
How is it now? |
by atmoic mass
by atomic number |
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where do you find elements with similar elements?
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in the same group or family
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where do the elements bcome MORE reative
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going DOWN the period
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where do the elements become BIGGER
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going DOWN and to the LEFT of the periodic table
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what is the atomic number equal to
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the number of protons in the element
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where are the valance electrons located on the perodic table
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at the top 1-8 skipping the 'D' block (transition metals)
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what did this lab leed to?
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the descovery of the ELECTRON
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what are atoms mostly made of
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open space
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when do atoms relese and absorb energy
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relese = going BACK home
absorb = going AWAY from home |
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how do you find energy amount
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subtract the engergy levels from eachother
(-3) - (-2) = always positive |
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what is the lewis dot strucure
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element symbol with amount of valance electrons around it
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when using the short cut to electron configuration how do you write it
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ex.
(Ar) 4s2 3p1 braket the nobal gas |
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what is the rule for p orbitals
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fill all 'up' arrows first then share rooms going down
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how many electrons does ... have?
S D P F |
2
10 6 14 |
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what is special about the D orbital
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that you must take away one orbital
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when the outer most S and P orbitals are filled
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octect rule
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