Electronic Configuration
Terms
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- Hund's Rule
- In p, d, and f orbital, first one electron fills each orbital and then pairing takes place
- ionization energy
- energy required to remove an electron from an atom
- Aubuau Principal
- Electrons occups lowest energy level
- periods
- the name gived to rows in periodic tables
- electronegativity
- the ability of an atom to attract the electrons of another atom towards istelf in a chemical bond
- Atomic number
- the modern periodic table of elements is arranged by this.
- atomic radius
- defined as half the distance between nuclei of identical atoms that are chemically bonded together
- cation
- formed when an atom looses electrons
- Mendeleev's proposition
- The chemical and physical properties of the elements increased gradually and suddenly changed at distinct steps, or periods
- francium
- has the lowest ionization energy
- covalent bond
- when the difference between the electronegativity of two atoms is less than 1.67
- Drastic shift
- occurs in chemical properties from left to right
- shielding
- represents the number of shells between the valence electron and the nulceus
- silver metal solid at room temperature
- sodium & lithium
- periodic law
- states that when elements are arranged in an order of increasing atomic number, they show a periodic repetition in their chemical and physical properties
- Pauli's Exclusion Principle
- Orbital can only hold two electrons, which should both have opposite spin
- Stable nonmetals
- oxygen, fluroine, and neon
- ionic bond
- when the difference between the electronegativity of two atoms is equal to or greater than 1.67
- ionization energy
- required to remove an electron from an atom
- groups
- the name given to coloumns in periodic tables
- anion
- when an atom gains electrons
- electro negativity
- ability of an atom to attract electrons from another atome involved in a bond
- Henry Moseley
- responsible for arranging the periodic so that an elements atomic number increased from left to right
- 1869
- Year when Mendeleev first proposed chemical elements
- fluorine
- the most electronegatice element on the periodic table