The conflict between the twins continued, and for some reason, the grandmother favored the left-handed twin. The right-handed twin became angry and resentful. He was the truthful twin who always did the right thing. The left-handed twin was deceitful and did everything backward. You could never trust him. The twins represented the two ways of the world which are in all people. The Indians did not call these good and evil. They called them the straight mind and the crooked mind, the righteous man and the devious man, the right and the left.

The main purpose of this excerpt is to
demonstrate that right-handed people are good and left-handed people are bad.
explain why some people do the right thing and others do not.
provide the reason why the grandmother favored the left-handed twin.
clarify what the Iroquois considered the two different sides of human nature.

first one is the correct answer

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

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.