Answer:1. 5
Explanation: the element is boron and the atomic number is 5
If two nonmetals with the same electronegativity bond, what type of bond will form then Non polar covalent bond (option D) will form.
The number of atoms in a molecule can be calculated by adding all of the number of elements from the chemical formula. For chlorophyll, the chemical formula would be <span>C55H72MgN4O5 adding all the elements we have 137 atoms. Hope this answers the question.</span>
