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Roman numerals next to element

Posted: Sun Oct 28, 2018 11:12 pm
by juliasloan_4g
What do roman numerals next to an elements name mean? Ex: in 2A.23 indium(III) sulfide

Re: Roman numerals next to element

Posted: Sun Oct 28, 2018 11:15 pm
by Meghanhe1l
The roman numerals specify the atom's ionic form for the atoms that can gain/lose differing number of electrons.

Re: Roman numerals next to element

Posted: Sun Oct 28, 2018 11:35 pm
by Ivan Tadeja 4B
The roman numeral proceeding the element name represents the charge of the element.

Re: Roman numerals next to element

Posted: Sun Oct 28, 2018 11:45 pm
by 705192887
The roman numeral signifies what the charge on that atom is. For example, depending on what Iron or another element is bonded to, it could be Iron II or Iron III to balance the charges. Hope this helps! #sickomode

Re: Roman numerals next to element

Posted: Sun Oct 28, 2018 11:47 pm
by ElliotPourdavoud 1A
It signifies the charge of that atom as some elements have different ion forms.

Re: Roman numerals next to element

Posted: Sun Oct 28, 2018 11:47 pm
by Arshia Ramesh 1G
It means the charge of the element!

Re: Roman numerals next to element

Posted: Sun Oct 28, 2018 11:58 pm
by Ashley Kim
It's important to note that some transition metals are capable of having multiple charges, hence the need for the Roman numerals in the first place. Transition metal ions involve a rearrangement of both the d and s orbitals. This is because according to the Aufbau principle, the electrons fill the 4s shell before the 3d shell, etc.

Re: Roman numerals next to element

Posted: Mon Oct 29, 2018 2:42 am
by Catly Do 2E
The use of Roman numerals in chemical nomenclature is to indicate the charge of the ion. Usually, the transitional metal has multiple possible ion charges. For example, Fe (II) stands for Fe2+ and Fe (III) stands for Fe3+; the charge changes according to the number of electrons on the atom.

Re: Roman numerals next to element

Posted: Mon Oct 29, 2018 9:26 am
by Jessica Dharmawan 1G
Roman numerals are used to name the different ions of the transition metals. An example would be: Cu3+ named as Cu(III).