When an iron bar is dipped into a solution of nickel(II) sulfate, a metallic deposit is observed. Write the balanced equation of the reac tion: When a lead bar is dipped into a solution of nickel (II) sulfate, no deposit appears. Show that these two experi ments allow predicting the position of nickel in the electronical classification.

the awnser is group 12

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.