Which of the following is a common property or characteristic of an acid?
slippery feel

bitter taste

increases the hydroxide ion concentration in solution

reacts with active metals to produce hydrogen gas

yes yes yes yes yes yes yes yes yes yes yes yes yes yes yes

explanation:

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.