What is true of the following chemical reaction? Hg + O - Hgo
The mass of the individual reactants together is more than the mass of the
product.
The mass of the products is more than the mass of the reactants.
The mass of the products is equal to the mass of the reactants.
The mass of oxygen does not add to the equation because it is a gas.

it is option c. the mass is equal of both

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i