Sodium (Na) and iodine gas (I2) react to form sodium iodine (NaI).

Question

Which equation is a correct representation of the balanced equation?

Responses

2Na+I2→2NaI
2 upper case N lower case A plus upper case I subscript 2 end subscript rightwards arrow 2 upper case N lower case A upper case I

I2→2NaI+2Na
upper case I subscript 2 end subscript rightwards arrow 2 upper case N lower case A upper case I plus 2 upper case N lower case A

NaI→2Na+I2
upper case N lower case A upper case I rightwards arrow 2 upper case N lower case A plus upper case I subscript 2 end subscript

Na→NaI+I2

Answer 1

The correct balanced equation for the reaction between sodium (Na) and iodine gas (I₂) to form sodium iodide (NaI) is:

\[ 2 \text{Na} + \text{I}_2 \rightarrow 2 \text{NaI} \]

This reaction shows that two sodium atoms react with one molecule of iodine gas to produce two formula units of sodium iodide. Therefore, the first option is the correct representation.