The atomic number of an element configuration 2,8, 8,2,13​

33

Explanation:

The atomic number of an element configuration 2,8, 8,2,13​ is 33.

The electron configuration is defined as the arrangement of electrons in atomic or molecular orbitals of an atom. The sum of electrons in different orbitals shown in the electron configuration represents the atomic number of the atom.

So, atomic number of the element configuration 2,8, 8,2,13​ is 33.

c. heat could easily travel through the molecules in the air and escape/enter the flask. removing the air slows down the heat transfer.  

2b2t

explanation:

2b2t