Prior to Thomson’s discovery, the atom was thought to be indivisible. Explain the significance of Thomson’s concept of the electron.

they are made of gases.

they have a spherical shape.

they make energy through fusion.

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.  

im doing test rn im going with 2 but ill give answer if itss wrong,   : )