Answer:
Helium is the second element on the periodic table. It is located in period 1 and group 18 or 8A on the righthand side of the table. This group contains the noble gases, which are the most chemically inert elements on the periodic table. Each He atom has two protons and usually two neutrons and two electrons.
Explanation:
thoughtco.com
 
        
                    
             
        
        
        
The atomic number of an atom is determined by the number of protons it has..
It is also the whole number shown on the periodic table 
        
             
        
        
        
Immposibile because water cannot pass through granite
        
             
        
        
        
What's the problem ? Hardness is not the definition of a metal.
You need to expand your thinking. EVERY element is solid, liquid, and gas, over different ranges of temperature ... including all of the metals. There are only TWO elements that are liquid AT ROOM TEMPERATURE, and mercury is one of them. But on a mild day at the south pole, mercury is solid too.
        
             
        
        
        
Can you show me the passage?