Do I need square brackets around ion like the mark scheme shows

this is the question https://ibb.co/GfNVypxV

i was wondering if i need to write it exactly like this https://ibb.co/WW3dyx92 or can i get away with writing it like this https://ibb.co/Kp8Bx1Xb

This was all the mark scheme showed so i wasn't sure if i would get the mark or if they mean the same thing, for some answers i fount it written without the charges at all so now im confused on which way to draw it out of the three different way.

Reply 1

Nitrotoluene

Okay, so when you write an ionic formula, always put square brackets around the ion. Also, be sure to show the ion's charge inside those brackets.

You must write as in https://ibb.co/WW3dyx92

Here is how it works:

-Clarity: The brackets make it very clear that it is an ion and what its charge is. This helps to avoid confusion, especially if you have complicated ions or a group of ions in one.
-Accuracy: The use of brackets is the normal way of identifying an ion in chemistry, as per regulation.
-Evaluation: Examiners usually ask for things to be written in this way to make sure everyone is on the same page. So using brackets can help you get a better grade.
Bye, Sandro

(edited 12 months ago)

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