Question

What evidence is there that
(i) Sodium has a low melting point;
(ii) Sodium is malleable and ductile?

Answer 1

Sodium is a chemical element with the atomic number 11 and the symbol Na (from Latin natrium). It's a delicate, silvery-white metal with a high reactivity. Sodium belongs to the periodic table's group 1 as an alkali metal. It only has one stable isotope, $^{23}Na$ . The free metal isn't found in nature, therefore it has to be made from compounds. Sodium is the sixth most prevalent element in the Earth's crust, and it may be found in feldspars, sodalite, and rock salt, among other minerals (NaCl).

Complete answer:
Sodium is the third least dense of the elemental metals, with a low atomic mass and a high atomic radius, and is one of only three metals that can float on water, the other two being lithium and potassium. Sodium's melting ( $98\text{ }{}^\circ C$ ) and boiling ( $883\text{ }{}^\circ C$ ) temperatures are lower than lithium, but higher than the heavier alkali metals potassium, rubidium, and caesium, following a periodic pattern down the group. EXPERIMENTAL proof of the same exists: The melting point of sodium metal is 98 degrees Celsius.
A dull knife can be used to cut sodium. It's possible to compress it using your fingertips. A sodium press is a device that allows a block of sodium to be pressed through a tiny hole in a metal die, resulting in a long, thin ribbon of sodium wire emerging into a solvent (which you want to dry efficiently).
Request a piece of sodium metal from your chemistry instructor, then place it in a plastic bag with some oil (under which the sodium is stored). Take a rolling pin (or a similar-sized metal tube), and you'll discover that the sodium is so flexible that you can roll it out like pastry, believe it or not. And proof that when you put sodium in a protic solvent, a gas is generated. $Na(s)+EtOH(aq)\to Et{{O}^{-}}N{{a}^{+}}+\dfrac{1}{2}{{H}_{2}}(g)$
Hence sodium has a low melting point and is malleable and ductile in nature.

Note:
Although metallic sodium has certain essential applications, the majority of sodium is used in the form of compounds; millions of tonnes of sodium chloride, hydroxide, and carbonate are generated each year. Sodium chloride is commonly used for anti-icing and de-icing, as well as as a preservative; sodium bicarbonate is commonly used for baking, as a raising agent, and sodablasting.