Question

Is sodium micronutrient?

Answer 1

Micronutrient and macronutrients are the nutrients which are required by the body in small and large quantities respectively. Plant nutrients have two categories supported on major and minor nutrient uptake. These major and minor nutrients are classified as such because of the quantity of nutrients the plant takes. It is because plants require them in smaller quantities than other macronutrients like-nitrogen, phosphorus, potassium.

Complete answer-
Sodium is required in large quantities as it maintains the osmotic pressure, mineral salt and much more, the micro element's particular role in the body. Hence, it cannot be considered as micronutrient. There are seven micronutrients required by plants such as- boron, zinc, manganese, iron, copper, molybdenum, chlorine. All the nutrients together constitute of $1\%$ dry weight.
Sodium is an essential dietary nutrient also required by human life than plants. An average person uptake $4200$mmol in its lifespan. Macronutrients such as magnesium and other nutrients play vital roles too in organisms and plant bodies. Magnesium is the energy source behind photosynthesis in plants. Magnesium is placed in the enzymes used in chlorophyll synthesis. In other words magnesium provides green pigment to the plant. Magnesium is additionally required for formation of macromolecules and also for the metabolism of carbohydrates and it also stabilizes the cell wall.
Zinc is used as a component of chlorophyll formation and some carbohydrates. It also helps in tissue development and formation of auxins which may be a phytohormone, helping in stem elongation and growth regulation.
nickel is also a micronutrient which plays an important role in seed germination, nitrogen fixation and metabolism of urea. It is essential for plant growth.

Note:
Micronutrients are as essential as vitamins and minerals in the body. They help in preventing and fighting diseases from the body. Sodium helps in muscle toning, water balance in the body and maintaining blood pressure in the body. Also helps in preservation of foods and certain kinds of safety towards food.