6. Extend your thinking: Many chemical properties are determined by the number of valence electrons. Elements with the same number of valence electrons will have similar properties.
Which element has similar properties to lithium?
Beryllium?
Explain:

the answer for sodium is 0.186

the answer for rubidium is 0.251

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.

thats how its supposed to be

aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.