<span>The electron configuration of lead is [Xe] 6s2, 4f14, 5d10, 6p2 according to the Aufbau principle.</span>
2-7 days, but depends on the procedure
Answer:
A machine have 75% efficiency means 25% of efficiency has been lost due to friction and a machine can work 75% only.
Answer:
A. it contains a lot of matter
