A chemist sets up a chemical reaction but finds that none of the reactant molecules have the required activation energy. What is the result

No reaction is observed

Explanation:

The activation energy is the minimum energy that reactants must have in order to cross the energy barrier and become converted into products.

When reactant molecules do not possess the required activation energy, collision between the reactant molecules becomes purely elastic and no reaction occurs.

Hence, colliding reactant molecules are only converted into product molecules when they possess the required activation energy.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

plants need sunlight, water, and carbon dioxide to make food. plants use the raw materials of water, nutrients they absorb from soil, and carbon dioxide to make sugars the plant can use. energy from the sun and chlorophyll are also needed.