Sentence examples for atoms are difficult from inspiring English sources

The extra pressure was needed because chemical bonds between nitrogen atoms are difficult to break.

The electron affinities of atoms are difficult to measure, hence values are available for only a few chemical elements, chiefly the halogens.

Note that such restoration of sharp emission from the GaAs QW was not observed in the 200°C-capped sample since the excess As atoms are difficult to remove even after post-growth annealing.

Ligand-exchange reactions are an important method for modifying or functionalizing the stabilizing ligand shell of nanoparticles.[ 1] Details of processes involving the ligand shell (and thus the surface atoms) are difficult to investigate, because most nanoparticles have no clearly defined structures.

The inclusion of iodine atoms is difficult in such particles, however as the particles grow, iodine compounds produced in the chemical reactions can be trapped or adhered to the particles.

Although the results obtained with these corrected functionals are usually improved for most applications, there is no systematic way of improving them, and high accuracy by low levels of theory or for large molecules (i.e., >100 atoms) is difficult to achieve.

At the moment, sheets of graphene that are just one atom thick are difficult to grow in a controllable manner, manipulate, or connect with other materials.

These atoms or metals are difficult to re-use, since they are mixed with others, but they haven't left our planet.

In the cases of Si[001] and Si[110], the Eds are determined to be 20 and 47 eV, respectively, indicating that the Si atoms are more difficult to be displaced along the [110] direction.

In bulk Si and Ge, the threshold displacement energies are shown to be dependent on the crystallographic direction and the atoms are more difficult to be displaced along the [110] direction.

These results suggest that in bulk Si and Ge, the Eds are strongly dependent on the crystallographic direction, and the atoms are more difficult to be displaced along the [110] direction.