Examlex
_______________aging refers to normal, disease-free development in adulthood.
Valence Electrons
The electrons in the outer shell of an atom that are available for forming bonds with other atoms.
B
In the context of the periodic table, "B" stands for Boron, a chemical element with atomic number 5, known for its ability to form covalent bonds.
Si
The chemical symbol for silicon, a hard, brittle crystalline solid used in semiconductors and as a component of various alloys.
As
A symbol for the chemical element arsenic, which is a metalloid known for its various allotropes and toxicity in many compounds.
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