34. interpret data look up the densities of the elements in group 1a on page r2. which group 1a elements are…

34. interpret data look up the densities of the elements in group 1a on page r2. which group 1a elements are less dense than pure water at 4°c?

34. interpret data look up the densities of the elements in group 1a on page r2. which group 1a elements are less dense than pure water at 4°c?

Answer

Explanation:

Step1: Recall water density

The density of pure water at 4°C is 1 g/cm³.

Step2: Look up Group 1A elements densities

Lithium (Li) has a density of about 0.534 g/cm³, sodium (Na) has a density of about 0.971 g/cm³, potassium (K) has a density of about 0.862 g/cm³, rubidium (Rb) has a density of about 1.532 g/cm³, cesium (Cs) has a density of about 1.879 g/cm³, francium (Fr) is radioactive and very rare but estimated to be denser than water.

Step3: Compare densities

Elements with density less than 1 g/cm³ are less dense than water at 4°C. So lithium, sodium and potassium are less dense than pure water at 4°C.

Answer:

Lithium, sodium, potassium