Build Carbon (6 red protons, 6 grey neutrons, 6 blue electrons) How many neutrons could an isotope of carbon have?
A. 5
B. 6
C. 7

B. 6

Explanation:

Isotope given:

                      ¹⁴₆C

In specie written as this;  

  Superscript  = Mass number

  Subscript  = Atomic number

To find the protons, it is the same as the atomic number;

               Protons  = Atomic number  = 6

Neutrons have no charges;

Neutrons  = Mass number - Atomic number  =

 Neutrons  = 14 - 6  = 8

The number of electrons is the same as the atomic number = 6

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