Density is a measure of what?
how much mass is in a substance
how much volume is in a substance
how much mass per unit of volume is in a substance

The correct answer is:How much mass per unit of volume is in a substance

Explanation:

Density is defined as the ratio of mass of the substance to the unit volume occupied of the substance .

Mathematically written as:

It can be also defined mass of substance present in the unit volume of the substance.

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  

a polar bond is formed when electrons are shared unevenly between atoms