Question

The lightest metal in the periodic table is:
A. Mg
B. Zn
C. Li
D. Na

Answer 1

Hint- In order to find the lightest metal we have to recall the density of given metal from periodic table, then we will proceed further by finding low density of the metal amongst the given options by comparing their densities.

Complete answer:
When we talk about a material being lightweight, what we’re really discussing is density. Density is the amount of matter per unit of volume. The less matter there is in a space, the lighter the substance is. So, the lightest metallic element is the one with the lowest density.
Now, we will recall the density of given metals from the periodic table.
Density of Mg − 1.7gm / c.c.
Density of Na − 0.968 gm / c.c.
Density of Zn − 7.14 gm / c.c.
Density of Li − 0.53 gm / c.c.
Here gm/c.c. means gram per cubic centimeter.
Therefore, the lightest metallic element is Li which has lower density among all the given metals,

Hence the correct answer is option C.

Note- The density of material shows the denseness of that material in a specific given area. A material’s density is defined as its mass per unit volume. Density is essentially a measurement of how tightly matter is packed together. Students may or may not remember the density of each metal but students must remember that lithium is the lightest metal in the periodic table.