Which is the first news paper of Nepal

Compare and contrast physical changes with chemical changes.

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?

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.