The atomic number of f plus the atomic number of na equals the atomic number of this element

Explanation:

Atomic number means the sum of total number of protons present in an element.

Atomic number of fluorine is 9 whereas atomic number of sodium is 11.

Therefore, atomic number of F + atomic number of Na

                 = 9 + 11

                 = 20

It is known that calcium is the element that has atomic number 20. Its electronic distribution is 2, 8, 8, 2.

Thus, we can conclude that the atomic number of F plus the atomic number of Na equals the atomic number of element calcium.

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2