Answer:
- rows and columns
 - period
 - atomic orbitals
 
4.similar properties
5.electrons are very reactive
 
        
             
        
        
        
Answer:
liquid state is an intermediate phase between solid and gas phase
Answer is A. H20
 
        
             
        
        
        
The answer is:
This happens naturally when a SLOW  moving river / stream meets a large standing body of water.
        
                    
             
        
        
        
The pair of elements which is most apt to form a molecular compound with each other would be sulfur and fluorine. In general, a nonmetal and a gas is most likely to form a molecular compound. Considering two metal molecules, most likely these metal atoms would not form a molecule since they are both positive when in ionic form and tends to donate electrons to another atom. For a situation where you have a nonmetal and a metal atom, it would not still be possible to form a molecular atoms since they are likely to form ionic bonds resulting to an ionic compound.<span />
        
             
        
        
        
Answer: Calcite is softer than fluorite.