Question

How many nitrogen atoms are in each formula unit of lead \[\left( {II} \right)\] nitrite \[Pb{\left( {N{O_2}} \right)_2}\;\] ?

Answer 1

Hint: Lead \[\left( {II} \right)\] nitrite is a chemical compound that comprises lead, nitrogen, and oxygen. One unit of lead \[\left( {II} \right)\] nitrite can be denoted by the chemical formula \[Pb{\left( {N{O_2}} \right)_2}\;\].

Complete step by step answer:
An atom is the lowest particle of an element. Two or more atoms joined chemically by chemical bonds to form a molecule. For example, when two hydrogen (H-H) atoms bond, the product is a molecule of hydrogen gas.
\[H\left( {atom} \right){\text{ }} + H\left( {atom} \right){\text{ }} \to {\text{ }}{H_2}\left( {molecule} \right)\]
You first have to see the formula lead nitrite for -which is \[Pb{\left( {N{O_2}} \right)_2}\;\] (this is a whole molecule) Which mostly means that u have
\[1\] lead - Pb atoms
\[2\] nitrogen - N atoms
And \[4\] Oxygen - O atoms
We have the one formula unit of lead nitrite, \[Pb{\left( {N{O_2}} \right)_2}\;\] . This is \[1\] lead atom, \[2\] nitrogen atoms, and \[4\] oxygen atoms. The bracketed part of the formula is extended out on multiplication.

Addition information:
Lead \[\left( {II} \right)\] nitrate is an inorganic compound with the chemical formula \[Pb{\left( {N{O_3}} \right)_2}.\] It commonly follows as a colourless crystal or white powder and, unlike most other lead \[\left( {II} \right)\] salts, is soluble in water.
Lead\ [\left( {II} \right)\] nitrate is toxic and must be felt with care to check inhalation, ingestion and skin contact. Due to its hazardous nature, the limited submissions of lead \[\left( {II} \right)\] nitrate are under constant analysis.

Note: The empirical and molecular formulas discussed in the previous section are specific and useful but they have some disadvantages. First, they are problematic for routine verbal announcement. For ex-, saying C – A three P - O four two for \[C{a_3}{\left( {P{O_4}} \right)_2}\]. In addition, many compounds have the similar empirical and molecular formulas but different engagements of atoms, which changes result in very different chemical and physical properties In such cases, it's required for the compounds to have different names that decide among the possible schedules.