What is a three-dimensional structure that represents the alternating pattern of particles in a crystal? a polyatomic ion a crystal lattice an ionic bond a formula unit

the correct answer is option d

explanation:

i was wrong its d because they dont use cm when calculating square roots

imma come back to you hold on

the correct answer to this question is 2

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.