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The Periodic Table (Trends (Electron Configurations (The number of…
The Periodic Table
Trends
Electron Configurations
Each family shares similar properties
The number of electrons in the OUTER MOST orbital dictate properties
examples
Group 1- 1e-/UNSTABLE
Group 18 - Filled and stable
Atomic Radius vs the atomic number
PT: L - R element gets smaller
PT:T-B element gets bigger
H-smallest
Fr-largest
Ionization Energy
Def:
The amount of energy needed to remove an electron
Trend
L->R- Energy need increases
T->B-Energy need decreases
What is ionization energy?
Ionization energy is energy that is measured when an element is in its gaseous state of matter.
What are periods on the periodic table?
The periods on the periodic table table are the groups of elements
Electronegativity
Def:
The ability to attract other electrons
Nonmetals will have a higher electronegativity
Metals will have a low elctronegativity
Who was Mendeleev and what did he contribute to the periodic table?
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Trends
Important People who worked on the Pt
Mendeleev
Henry
How is the periodic table arranged?
The periodic table is arranged by increasing atomic number and number of protons
Who was Dmitri Mendeleev? What year did he make his discovery?
Dmitri Mendeleev published the first modern atomic mass table in 1869
What are alkali metals?
Alkali metals are metals that explode when they come in contact with water and are all s1s
What are representative elements?
Representative elements are a display of wide range physical and chemical properties
What are halogens?
Halogens are the general class of compounds called salts. Halogens are artifically created elements.
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What are transition metals?
Transition metals are the highest occupied s sublevel and a nearby d sublevel containing electrons
What are cations?
Positive charge ions that lose electrons
What are anions?
Negative charge ion that gains electrons
Metals tend to carry what charge? Nonmetals tend to carry what charge?
Metals tend to carry a positive charge and nonmetals tend to carry a negative charge
What is ionization and energy? What is the trend for electronegativity found on the periodic table?
Electronegativity is the ability of an atom of an element to attract electrons when the when the atoms is in a compund.
What is the periodic law?
The periodic law is when elements are arranged in order of increasing atomic number.
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Who was Dobereiner and what did he contribute to the periodic table?
Dobereiner was a chemist and he contributed the similar properties of chemicals to the periodic table.
Families on the periodic table
Periodic laws