Heating curve below shows the temperature change that occurs as a solid is heated. what is occurring at segment bc of the graph? a line graph showing the heating curve of a substance being heated from the solid phase all the way to the gas phase. from left to right across the x-axis, the different regions of the heating curve are labeled with variables a through f. first, there is an incline with a positive slope labeled ab, followed by a horizontal region labeled bc. then there is another incline with a positive slope labeled cd, followed by another horizontal region labeled de. the end of the heating curve shows another incline with a positive slope labeled ef.

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.  

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.