Which of the following is true for a neutralization reaction.. 1.
a. the pH does not change

2.
b. the pH always increases

3.
c. the pH always decreases,

4.
an acidic substance becomes less acidic.

5.
e. all of the above

the ratio of the conjugate base to the acid required to attain the desired ph.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.