Based on the cations identified in the question above, determine if the painting in question was a forgery. Explain how you were able to determine if the painting was a forgery. Indicate which pigments were likely in the unknown and when they were likely used. Note that each cation itself is not a pigment; the full chemical formula for each pigment can be found in the Pigment Handbook in your lab manual.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

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.