Answer:
The number of electrons in an atom's outermost valence shell governs its bonding behaviour. Elements whose atoms have the same number of valence electrons are grouped together in the Periodic Table. ... To form a covalent bond, one electron from the halogen and one electron from another atom form a shared pair.
 
        
             
        
        
        
Answer:
I think the answer is "Steno's principles".
Explanation:
 
        
             
        
        
        
Yes a hypothesis is an educated guess because you guess on what the conclusion will be in an experiment 
        
             
        
        
        
Consumers get energy to function by consuming food from other organisms (animals), while producers get their own energy from themselves (plants)