Answer:
Atoms are single neutral particles. Molecules are neutral particles made of two or more atoms bonded together.
Explanation:
Atom refers to the smallest constituent unit of a chemical element. Molecules refer to a group of two or more atoms that are held together due to chemical bonds.
 
        
                    
             
        
        
        
Well you should study how different chemicals work, and make flashcards to carry around or make notes during class to study for later
        
                    
             
        
        
        
1: True
2: True
3: False
4: False
(Question 2 might not be true, not sure)
        
             
        
        
        
The statement seems to be true, as per my knowledge.
Hope I helped!! xx
        
             
        
        
        
Hi, thank you for posting your question here at Brainly. 
The acid dissociation constant, Ka, is an equilibrium constant that measure the strength of an acid. It is a ratio of the concentration of the products (salt and water) and the reactants (acid). The higher the Ka, the more tendency it is to favor the product side, which means more tendency to donate H+ ions. This is exactly the definition of a strong acid (high H+ ionized).
Thus, the answer is letter D.