Which symbol represents a particle that has the same total number of electrons as s2–?
(1) o2– (3) se2–
(2) si (4) ar

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

increased stability in the completion of fluorine's outer shell.