Question

symbol of cation and anion present in sodium oxide. and why do ionic compounds have Hard and rigid structures?

Answer 1

Question:

symbol of cation and anion present in sodium oxide?

Answer:

When writing the formula of a compound, the cation is listed before the anion. For example, in NaCl, the sodium atom acts as the cation, while the chlorine atom acts as the anion. When writing cation or anion symbols, the element symbol(s) is listed first. Na2S as sodium.

Question:

why do ionic compounds have Hard and rigid structures?

Explanation:

Ionic compounds are usually formed when metals react with non-metals”. ... This electrostatic force is the main reason for hardness of ionic compounds. The oppositely charged ions in an ionic compound are packed tightly with each other and form a crystalline structure which is very hard and rigid.

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Answer 2

Answer:

Well it's quite difficult for me as well!