Honors Chemistry: Periodic Trends Guaranteed Success - Atomic Radius:
️ Half the distance between two identically bonded atoms. - Ionic Radius:
️ The radii of the most commonly found ion of the element. - First Ionization Energy:
️ The energy required to remove one electron from a...
✔️ Half the distance between two identically bonded atoms.
- Ionic Radius:
✔️ The radii of the most commonly found ion of the element.
- First Ionization Energy:
✔️ The energy required to remove one electron from a neutral atom of an element.
- Electron Affinity:
✔️ The energy change that occurs when an electron is acquired by a neutral atom.
- Number of Valence Electrons:
✔️ The electrons that are available to be lost, gained, or shared in the formation of chemical
compounds.
- Melting Point:
✔️ The temperature at which a solid turns into a liquid.
- Thermal Conductivity:
✔️ The ability of a substance to conduct heat.
- Electronegativity:
✔️ The ability of an atom to pull the bonded electrons to itself in a chemical compound.
### Trends Across a Period:
, - Trend From Left to Right Across a Period (Atomic Radius):
✔️ Decrease.
- Trend From Left to Right Across a Period (Ionic Radius):
✔️ Decreases across the metals and then gets much larger at the nonmetals and then decreases
again.
- Trend From Left to Right Across a Period (First Ionization Energy):
✔️ Increases.
- Trend From Left to Right Across a Period (Electron Affinity):
✔️ Increases.
- Trend From Left to Right Across a Period (Number of Valence Electrons):
✔️ Increases.
- Trend From Left to Right Across a Period (Melting Point):
✔️ Decrease.
- Trend From Left to Right Across a Period (Thermal Conductivity):
✔️ Decreases.
- Trend From Left to Right Across a Period (Electronegativity):
✔️ Increases.
### General Concepts:
- Periodic Trends:
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