Question

Identify the element X in the compound X2(CO3),​

Answer 1

Answer:

Na2CO3

Explanation:

sodium (Na) is the correct answer

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Answer 2

Answer:

The formula of its phosphate and chloride is $XPO_{4} }$ and $XCI_{3}$  respectively.

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.  

                                                                                                                           Here metal is having an oxidation state of +3 and carbonate is a polyatomic ion with oxidation state of -2. Thus the oxidation states are exchanged and  combine to form neutral  $X_{2} (CO_{3})_{3}$

Thus the chloride will have a formula as chloride is having an oxidation state of -1, chloride will have a formula $XCI_{3}$. Phosphate will have a formula $XPO_{4}$  as phosphate is having an oxidation state of -3.

The formula is $XCI_{3}$

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