Which of the following is an example of how a scientist might use a model? a) a stopwatch is used to time the rate of a chemical reaction b) the end of a slinky is moved vertically up and down to simulate a wave c) a microscope is used to magnify a group of cells on a slide d) a wrench is used to tighten a nut onto a piece of wood p. s.- this is science not chemistry

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.