Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Atomic bonding and electrical characteristics of metallic and
  semi-metallic elements from the binding energy and bond charge model   In this paper, we use density functional theory to calculate the electronic
structure and properties of 47 metallic and semi-metallic elements. The binding
energy and bond charge model (BBC) model is combined with the tight binding and
density functional tight binding approaches to obtain quantitative information
about atomic bonding at the atomic scale and to understand the contributions
and effects of deformation energy density, energy shifts, and atomic bonding on
the Hamiltonian.

12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics