Two compounds are mixed and light is emitted, the color changes, and heat is liberated.

Which activity has occurred?

chemical nucleus exchange

chemical reaction

chemical compromise

chemical mixture

it would be a gas formation

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.  

lab safety rules

explanation: