What is an ionic solid?
a. many metal atoms bonded together to from a solid
b. many positive and negative ion bonded to from a solid
c. many nonmetal atoms bonded together to from a solid
d. one positive ion and one negative ion boded to form a solid

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest

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.