Question

The stability of the molecule is measured by​

Answer 1

Explanation:

Mechanical stability can be checked by computing the force constants (or the Hessian matrix of the energy second derivatives). If it is positive definite then your molecule is stable, meaning it will not deform as it is at its energy minimum. Chemical stability maybe checked by calculating the HOMO-LUMO gap.

Answer 2

Namometer

The nanometre is a unit of length in the metric system, equal to one billionth of a metre. One nanometre can be expressed in scientific notation as 1×10⁻⁹ m, in engineering notation as 1 E−9 m, and as simply metres.