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westerngal95
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How are symbols for elements written?
First letter uppercase, second (if any) lower case.
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Where do symbols for elements come from?
Fist letter of current name, letters that make you say the word of the current name, and from the original name.
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How do scientists assign names to elements they discovered?
Different language discriptive words, where element was discovered, named after scientist who discovered it.
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What makes parts of an atom?
- Proton- (+) in nucleus. located by atomic # (smaller number)
- Neutron- (neutral) In nucleus. Located by mass # - atomic #
- Electron- (-) energy levels outside nucleus. Find by atomic # because in a neutral atom protons and electrons are equal.
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Atomic Mass
Atomic Number
- Atomic Mass - Protons and Neutrons
- Atomic Number- Protons
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Atomic Symbol (aXz) equals?
- A=Mass Number
- X= element symbol
- Z=Atomic #
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Isotope
Atom of same type that has same number of protons but different number of neutrons. (change in neutrons) To identify look at mass # and compare to table mass #.
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Alkali Metals
Group 1. Without H.
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Alkaline Earth Metals
Group 2
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Transition Metals
Group 3-12
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Lanthanides
Group 51-71 and 57 and 89
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Metalloids
staircase. Metals and non-metals
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Staircase
14. 32. 33. 51. 52. 84
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Diatomic elemts
tripple 7+1
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group charges
(+1)(+2)(whatever)(+3)(+-4)(-3)(-2)(-1)(0)
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three properties of metals
shinny, malable, ductile
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Ion
compounds that are formed by gaining or losing electrons
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3 properties of Ionic substance
- non and real metal
- conduct electricity
- charge of 0
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