Define compound in your own words

I think the compound is a chemical bound the compound o cant say I trying

Explanation:

oh the compound is a chemical substance like atoms like H2O and other atoms they have many compounds I think this should be ans

if its ans is too long you want then tell me in comment

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