Question

Na has physical and chemical properties similar to which elements and why

Answer 1

Sodium has physical and chemical properties similar to alkali metals because the hace same valence electron,  valency , nature.

Answer 2

Na has physical and chemical properties similar to lithium and potassium elements because they have same number of valence electrons.

Explanation:

Species which contain same number of valence electrons will tend to show similar chemical properties. This is because valence electrons determine the reactivity of an element.

Therefore, sodium will show similar chemical properties as that of potassium, lithium, rubidium and cesium.

Also, its is known that physical properties are defined as the properties which does not cause any change in chemical composition of a substance. For example, boiling point, melting point, density etc are physical properties.

Learn more about physical properties:

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