Answer
43. (a)
As red represents oxygen atom (O) and white represents hydrogen atom (H) and
white atom is bonded to the red atom and there is an overall negative charge on this,
so this diagram represents an ion with oxygen atom bonded to hydrogen atom and
overall one unit negative charge on it, so we can write
Formula of ion= [OH]—
Name of the ion= Hydroxide ion
(b)
As blue represents nitrogen atom (N) and red represents oxygen atom (O) and
each of the two red atoms are bonded to the blue atom with an overall negative
charge on this, so this diagram represents an ion with nitrogen atom bonded to two
oxygen atoms and overall one unit negative charge on it, so we can write
Formula of ion= [NO2]—
Name of the compound= Nitrate ion
Work Step by Step
1. Identify the atom corresponding to the color given in the problem.
2. Check the atoms which are bonded to each other.
3. Look for the charge on the species given.
4. Identify the ion.
5. Write the formula and name of the ion.
