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29 Cards in this Set
- Front
- Back
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Doberemeir
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Published classification system into triads. Triads= 3 elements with similar properties
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Mendeleev
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elements arranged into groups based on repeating properties (increasing atomic mass). Now it's by increasing atomic number.
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Periodic Law
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when elements are arranged in order of increasing atomic number. Periodic repetition of their phys./chem. properties
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Group 1A
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Alkali Metals
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Group 2A
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Alkaline earth metals
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Middle group
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Transition Metals
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"under staircase"
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Metalloids
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Group 3A-6A
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Nonmetals
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Group 7A
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Halogens
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Group 8A
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Noble gasses
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metals
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malleable, conduct. electricity, shiny, solid at room temp.
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nonmetals
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bad conductors of electricity, not malleable, not shiny, not always solid at room temp.
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metalloids
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may have similar properties of metals or nonmetals depending on conditions
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Cation
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positively charged ion, always smaller
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Anion
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negatively charged ion, always larger
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Atomic Size
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increases down , decreases to the right
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Ionization Energy
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decreases down, increases to the right
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Ionic Size
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increases down, decreases to the right
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Electronegativity
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decreases down, increases to the right
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Nuclear Charge
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increases down, increases to the right
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Shielding
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increases down, is constant to the right.
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Noble gases
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their highest occupied energy level has the "s" and "p" sublevels filled.
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Transition metals
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the highest occupied "s" and nearby "d" sublevel contain electrons
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Inner transition metals
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the highest occupied "s" and nearby "f" sublevels generally contain electrons.
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Atomic Radius
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one half of the distance between the nuclei of two atoms of the same element
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Atoms of metallic elements
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tend to lose one or more electrons from the highest occupied energy levels.
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Atoms of nonmetallic elements
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tend to gain one or more electrons from the highest occupied energy levels.
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Ionization Energy
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he energy required to remove an electron from an atom
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Electronegativity
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the ability of an atom of an element to attract electrons when the atom is in a compound.
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