d - block and f - block Elements
Compounds of which of the following transition elements do not exhibit an oxidation state of +3?
The highest oxidation state shown by element with atomic number 23 is:
$$Z=23$$
Vanadium $$=[Ar]4s^23d^3$$,
$$5$$ valence electrons
So, maximum oxidation state it could show is $$+5$$ by ionizing all the valence electrons.
Compounds of which of the following transition elements do not exhibit an oxidation state of +3?
Mercurous ion is represented as:
The element that acts as a good catalyst for several reactions has a atomic number:
The element that usually does not show variable oxidation states is :
Which of the following statements about $$Na_2O_2$$ is not correct?
Which one of the following exhibits the largest number of oxidation states?
In context with the transition elements, which of the following statements is incorrect?
Which one of the following species is stable in aqueous solution
Iron exhibits +2 and +3 oxidation states. Which of the following statements about iron is incorrect?
The correct statement(s) about $$\displaystyle Cr^{2+}$$ and $$\displaystyle Mn^{3+}$$ is(are): $$\displaystyle \mathrm {\left [ Atomic\ numbers\ of\ Cr = 24\ and\ Mn = 25 \right ]}$$