The ionic radius of a sodium ion is 2.27 angstroms (A) . What is this length in um

According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons

Ascientist conducted an experiment and discovered that certain plants grow faster when given a particular amount of fertilizer. anouther scientist conducted the same experiment and got similar results. which concept does this best illustrate? a) repetition b) replication c) precision d) validity

What are several ways to reduce the effect of friction