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Academic Chemistry Class Notes April 9, 2015 Periodic Trends of the Elements
Atomic Radius - the size of an atom. Increases to the left and down on the periodic table.
Electron levels are added as you go down a group. (atomic size increases)
The nuclear charge increases as you go across a period toward the right. (atomic size decreases)
Ionic Radius The negative ion (anion) is always larger than the neutral atom.
The positive ion (cation) is always smaller than the neutral atom.
Electronegativity - the force of attraction an atom has for the electrons shared in a chemical bond
Ionization Energy - the energy required to remove the first electron from a neutral gaseous atom.
The radioactive elements in any group are generally found at the bottom of the periodic table.
Periodic Trends You will know what ionization energy is and how it trends on the periodic table You will know what electron affinity and electronegativity.
Electronegativity A measure of the ability of an atom that is bonded to another atom to attract electrons to itself. Trend: Increases from left to right.
Trends in the Periodic Table
Periodic Trends Mrs. Coyle Chemistry.
The Periodic Law Electron Configuration and Periodic Properties.
AP Chemistry Chapter 6 Notes. Periodic Law – properties of the elements are a periodic function of their atomic number The moon’s phases and magazine.
Electron Configuration and Periodic Properties
Trends and Similarities
Periodic Table Trends.
After today, you will be able to… Explain the periodic trend for ionic size and electronegativity Compare the size of cations to the size of anions.
WHAT ARE THE PERIODIC TRENDS?. Periodic Trends All information in contained in table S Predictable properties/changes that occur as we move down groups.
1 Periodic Trends. 2 Early Design Changes developed by Dmitri Mendeleev in the mid- 1800s –Organized elements by mass into rows and columns –Found elements.
Mendeleev Made periodic table based on atomic mass and other properties. (especially chemical) Had blank spots for undiscovered elements Called periodic.
Chemical Periodicity Ch. 14.
Even More About the Periodic Table
Ch-6 sec-3. Atomic Size Atomic Size is measured as half the distance between two nuclei Size generally decreases with atomic number within a period Size.
Chemistry Chapter 6/7 Notes #3.
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