The maximum concentration of flouride ions in municipal water supplies is 1.5ppm. What is the maximum mass of Flouride ions you would get from a 0.250 L glass of water?

b) nuclear ive learned that in a pedtrodic table

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.