Plz help and write a proper paragraph

How does concentration affect reaction rate

Will mark brainliest how many electrons can be held in the energy level n = 4?

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.