Electrons and protons (attract/repel) each other. As an electron gets closer to the nucleus the (attraction/repulsion) to the nucleus gets (stronger/weaker).

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?

Element j is 1s 2s 2p 3s . (i) how many unpaired electrons does j have? (ii) is j a good oxidizing agent or a reducing agent? (iii) state reason for the answer.

In which phase of mitosis do the spindle fibers pull the chromosomes apart to opposite sides of the cell ?