Answer plus work for top question

What is the subscript for oxygen in its molecular formula

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent

Na chemical reaction, activation energy increases the of the reactants. this outcome causes the particles to collide, which results in the of new products.