Valence Electrons
Saylor Academy・2 minutes read
Electron configurations help predict elements' reactions and their placement on the periodic table. The outermost shell of an atom determines its reactivity, with elements striving for stability by gaining or losing electrons accordingly.
Insights
- Electron configurations are crucial for understanding how elements behave and where they belong on the periodic table, with the outermost shell dictating reactivity.
- The desire for stability drives elements to either gain or lose electrons, as seen in the reactivity of alkali metals and halogens, highlighting the importance of achieving a full outermost shell for chemical stability.
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Recent questions
How do electron configurations help predict reactions?
By grouping elements and determining reactivity based on shells.
What is the electron configuration of lithium?
1s2 2s1
Why are noble gases considered stable?
They have eight electrons in their outermost shell.
Why are alkali metals highly reactive?
They want to give away electrons for stability.
What determines an atom's reactivity?
The number of electrons in its outermost shell.
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