The microscope objective lens has a magnification of 40x. how many times will it magnify the specimen

Enzymes affect the reactions in living cells by changing the

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.

If an atom has 12 protons and 13 neutrons