H2 is a gas which forms when two hydrogen atoms bond together and become a hydrogen molecule. H2 is also called molecular hydrogen.It consists of two protons and two electrons. Consequently it is the most common form of Hydrogen because it is stable with a neutral charge. ... H2 is the smallest molecule in the universe.
        
                    
             
        
        
        
Answer:
Parasitism
Explanation:
Parasitism is a symbiotic relationship between two species in which one benefits and the other is harmed. 
 
        
             
        
        
        
Naturally occurring lithium<span> (chemical symbol Li) (relative </span>atomic mass<span>: 6.941(2)) is composed of two stable </span>isotopes<span>, </span>lithium-6<span> and </span>lithium<span>-7, with the latter being far </span>more<span> ... </span>Lithium-4 contains threeprotons<span> and one </span>neutron<span>. ... An accurate </span>atomic mass<span> for </span>samples<span> of </span>lithium<span> cannot be measured for all sources of </span>lithium<span>.</span>
        
             
        
        
        
There’s
an even distribution pattern among a particular species in a community because species
is territorial in <span>which they protects its <span>territory</span> from incursions by others of its species. Animals
sound or scent are their way of marking territorial boundaries, chases and
fighting will happen for instances that such markings do not dishearten the
intruders. </span>
        
             
        
        
        
Explanation:
It is a place where shares of pubic listed companies are traded. ... A stock exchange facilitates stock brokers to trade company stocks and other securities. A stock may be bought or sold only if it is listed on an exchange.