Tell your teacher. They'll know what to do and it's best to report it to them.
Answer: similar, energy
Explanation: (edmentum answer) Several of the elements in period 5 have electron configurations with only one electron in the 5s sublevel. That suggests that the next sublevel that electrons typically fill, 4d, is not much higher in energy.
answer: 3g. 17kg+3 ÷ 0.25