Element Z is in Group 1 and element Q is in Group 16. What happens when a compound is formed between these two atoms? 1) Z loses electrons to Q to form an ionic bond
2) Z gains electrons from Q to form a covalent bond
3) Z gains electrons from Q to form an ionic bond
4) Z loses electrons to Q to form a covalent bond

THERE CAN BE MORE THAN ONE ANSWER

the maximum mass of nh3 is nh3 in grams

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.