What’s N7Br covalent name

If you are presented with covalent compounds that consist of two or more atoms of the same element bonded together, the name of the molecule is the same as the name of the element. For example, Cl 2 is simply called "chlorine.

Explanation:

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

particle   p is an electron and particle q is a neutron