An element melts at about 100 degree centigrade and forms an oxide which reacts with water to form a solution with a pH less than 7. Which of the following statements is most likely true :

1. the element conducts electricity

2. the element has a covalent network structure

3. The oxide is basic

4. The oxide contains covalent bonds

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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.  

hypostyle hall;