4. When driving along a side-road at 45 m/s, you see a child run out into the street, and rapidly slow to 3 m/s, i within 1.5 sec. What is your acceleration?​

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.