Calcium atom vs calcium ion

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.

The missing component to the table to the right or indicated with orange letters complete the table by filling in the corresponding numbers or symbols

Which statement would indicate the presence of an acid