Figure 1. formation of a pepude bond
which of the following best describes the formation of the bond shown in figure 1?
an ionic bond is formed between a carbon atom of one amino acid and the nitrogen atom
of the other amino acid.
an ionic bond is formed when the negative charge of an oh group is balanced by the
positive charge of a hydrogen ion.
a covalent bond is formed between a carbon atom and a nitrogen atom along with the
formation of h2o.
a covalent bond is formed that replaces the hydrogen bond between the oh group and
the h atom.

answer: h+ its less than oh

explanation:

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.