Among the following, the metal with lowest density is :

Question

Accepted Answer

## Model Answer **(a) Lithium** Alkali metals like lithium have low densities. Among the given options, lithium has the lowest density (~0.53 g/cm³). Source: Physical Properties, Chapter 3, Section 3.1.1 ## Explanation The textbook states that alkali metals (lithium, sodium, potassium) have **low densities**. Among the options — Lead (very dense), Magnesium and Aluminium (moderate density) — lithium is the lightest metal overall. Examiners expect you to recall this directly from the exceptions listed in Section 3.1.1.

Science (086) — CBSE Class 10 board question