30. Explain why knowing both the period and group trend for atomic radius before the "It's In the Cards Activity would have helped you put the cards of the periodic table puzzle into correct order much more quickly

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.

they are all solids.

the objects have the same charge.