Which of the following is NOT a group on the periodic table? A. Metalloids B. Alkali metals C. Halogens D. Alkali Earth metals

A. Metalloids

Explanation:

A group is a vertical column going down on the periodic table.

Group 1A is known as the alkali metals.

Group 2A is known as the alkali earth metals.

Group 7A or 17 elements are called halogens.

Metalloids do exist on the periodic table but they are diagonal starting with boron and ending with astatine. Therefore, metalloids are not a group on the periodic table.

Hope that helps.

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.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.