Aproton is added to an atom of oxygen, oxygen-16. all but one statement is true. a) the atom becomes an isotope b)the charge of the atom changes c) the mass of the atom increases d) the mass of the nucleus increases

The clear answer here is A.)

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  

6.4 cm (max) - 25 cm (min)