Atoms that have become negatively charged by gaining extra electrons are called

CATION

Explanation:

If an atom has an equal number of protons and electrons, its net charge is 0. If it gains an extra electron, it becomes negatively charged and is known as an anion. If it loses an electron, it becomes positively charged and is known as a cation.

answer; talc and gypsum;

answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;