Determine whether the given name for each ionic compound is correct or not. C o I 2 CoIX2: cobalt(II) iodide Correct name B a C l 2 BaClX2: barium dichloride Correct name C s 2 O CsX2O: cesium oxide Choose... R b 2 S RbX2S: rubidium sulfite Correct name S r B r 2 SrBrX2: strontium(II) bromide Incorrect name

: cobalt (II) iodide : correct

: barium di chloride : incorrect

: cesium oxide: correct

: rubidium sulphite : incorrect

: strontium (II) bromide : correct

Explanation:

The nomenclature of ionic compounds is given by:

1. Positive is written first followed by the oxidation state of metal in roman numerals in parenthesis.

2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.

Hence, the name of is cobalt (II) iodide, is barium (II) chloride, is cesium oxide, is rubidium sulphide and is strontium (II) bromide.

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

it would be d. henry moseley

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