2) When you mix a light blue/green aqueous solution of copper (II) chloride with a solid piece of aluminum metal, what is an easy, VISUAL observation you could make to determine which reactant is in EXCESS vs.
which reactant is the LIMITING REACTANT?

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.

the answer would be a

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.