When comparing the ir spectra of the two compounds below, what absorption(s) would allow you to distinguish the compounds? hc≡cch2n(ch2ch3)2andch3(ch2)5c≡n strong, broad peak at 3600−3200 cm−1 medium peak at 3500−3200 cm−1 medium peak at 3300 cm−1 medium peak at 3150−3000 cm−1 strong peak at 3000−2850 cm−1 medium peak at 2250 cm−1 strong peak at ~1700 cm−1 medium peak at at 1650 cm−1 medium peak at 1600, 1500 cm−1 no distinguishing peaks

i had this on my unit activity, i can you if you are a plato student. are you a plato student?

assuming that your periodic table has eighteen columns, you should highlight   the four elements in the third column from the left of the table.

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the have energy higher than those in the orbital while lower than those of the orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the orbital is therefore filled right after orbitals and before orbitals.  

potassium has electron configuration and calcium . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the and should be highlighted as well.