All organic molecules have what element in common? a carbon b nitrogen c phosphorus d sulfur

a) Carbon.

Explanation:

The organic chemistry is normally based on the chemical elements Carbon, Hydrogen,oxygen, sulphur and Nitrogen. Sometimes a mixture or compound of one or more of these will be found such as  (carbohydrates, fats, proteins). The varieties of organic molecules are based on these atoms, with carbon as the skeleton of the organic molecule.

Hence out of the four options given we find that though nitrogen, sulphur are also common in organic the most common is the first option

a) Carbon.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

12 is it do you think so