chemistry 2 Flashcards
attributes of non metals
Gas, Liquid, or Solid; Brittle when solid; poor conductors
attributes of Metals
Lustrous, malleable, ductile, good conductors
Attributes of Metalliods
seperate the other 2 from B-At and Ge-Po and are a mixture of the two
Alkali Metals
found in group 1 excluding hydrogen, highly reactive, low everything else
Alkaline Earth Metals
Group 2 highly reactive, low everything else
Transition Metals
Group 3-12 good conductors and maluable, Have more than one ion charge
Make colored compounds
Metalloid
Elements B- At ; Ge-Po
Post Transition Metals
bottom half of 13-16, Have more than one ion charge
Halogens
Group 17 highly Reactive
Noble Gasses
Group 18+ Hydrogen, Inert
Inner Transition Metals
Lanathanoid/Actinoids, Usually found together in nature
Have high melting points
Actinides are all radioactive, Make colored compounds
Ionic Size
Positive Electrons lose electrons= Smaller
Negative Electron Gain Electron= Bigger
Meneleev
Periodicity(1869)
Moseley
Atomic Numbers(1911)
Mendeleevs Periodic Law
Properties of the elements recur in regular cycles (periodically) when the elements are arranged in order of increasing atomic mass.
Periodicity
the tendency to recur at regular intervals
Errors in Mendeleevs Table
Some elements did not fit the periodic pattern of reactivity if in order by increasing mass.
so
Mendeleev left them in order of reactivity and predicted the problem with mass would be solved later.
Modern Periodic Law
Properties of the elements recur in regular cycles (periodically) when the elements are arranged in order of increasing atomic number.
Row or Period
<—-> left to right
Column or Group
^ up or down
Atomic Radius Trend
It increases moving down and Left
Had a common Trend of a diagional arrow going Right to left, Biggest Density is Francium
Def of Ionization Energy
The amount of energy needed to remove a valence Electron
Ionization Energy Trend
Increases moving to the right and up
Trend line moves from left to right corner,the highest energy is Helium
Def of Electron Affinity
The attraction of an atom for an additional electron
*Noble Gasses do not have measurable electron Affinity
Electron Affinity Trend
Electron Affinity Trends diagnoly from bottom left to top right with chlorine having the highest
electronegativity def
ability to gain an electron, noble gasses do not follow this
electronenegativity trend
diagonal increase from left to top right
