Answer:
The result of the atomic theory was atomic theory proposed that all matter was composed of atoms, also postulated that chemical reactions resulted in the rearrangement of the reacting atoms.
 
        
             
        
        
        
Answer: b} The exact time when an individual atom will decay can be accurately predicted.
c} After each half-life, the amount of radioactive material is reduced by half.
Explanation:
All radioactive decay  follows first order kinetics.
Rate law expression for first order kinetics is given by:
 
where,
k = rate constant
t = time taken for decay process
a = initial amount of the reactant
a - x = amount left after decay process
Expression for calculating half life, which is the time taken by the half of the reactants to decompose is:

 
        
                    
             
        
        
        
Answer:
None of the options are correct 
Explanation:
Ketone is an organic compound with general formula RCOR' ie RC=OR where R and R' are alkyl groups. Example of ketone can be written as:
C—C—C=O—C
 
        
                    
             
        
        
        
Answer:
B. To change from a liquid state to a solid state is called Freezing 
 
        
                    
             
        
        
        
Methane.
Water - H2O
Methane - CH4
Methane has 2 more hydrogens than water.