Question

A new element, acordnium, has been isolated and, consistent with some predictions, is nonradioactive. While only nanogram amounts are available, spectroscopic analysis (X-ray photoelectron spectroscopy, etc.) suggests that acordnium is in the same family as chromium and will share many of its chemical properties, including most common oxidation state. Preliminary analysis suggests that the air stable form of acordnium has a radius of 130 pm. Predict the formula of the form (cation, anion or oxide) in which it would likely be found in a beaker of pH 5.5 to 7 water.

Answer 1

Chromium has +6 + 3 and +2 as its most stable oxidation state. This new element which I would represent by 'X' would also show the more or less the same oxidation states.

Thus it might form oxides of the form X₂O₃ where acordnium taks +3 oxidation state or XO₃ where X has +6 state.

Chromium shows its Highest oxidation state in dichromate.

Cr₂O₇^2-  , there this might also exhibit its highest oxidation state in similar manner as X₂O₇^2-( migh not be stable)

Thus is only answered on basis of similarities that run run down a group.

There is no reference available where a metal named Acordnium is said to be found, I even checked the internet for details but nothing is available.

So, the answer is provided considering a hypothetical element.

Thankyou .

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