What is the trend in effective nuclear charge for elements on the periodic table?
it decreases across a period but is constant down a group.
it increases across a period but is constant down a group.
it is constant across a period but decreases down a group.
it is constant across a period but increases down a group.

increases across a period but is constant down a group.

Explanation:

it should be all of them because it asks if you included all of those in your answer

explanation:

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.