Question

For $124g$ of ${P_4}$ will contain which of the following
a.$4$ atoms of Phosphorus
b.$4{N_A}$ atoms of Phosphorus
c.${N_A}$ molecules of Phosphorus
d.$1$ molecule of Phosphorus
1.a and b
2.b and c
3.a and c
4.b and d

Answer 1

Atom is the tiniest unit of the substance. Every substance is made of an atom. The molecule is another form of substance that is the combination of two or more than two-atoms. The atom is either the same or different.

Complete step by step answer:
Before calculating the number of an atom in Phosphorus, let's have a look at more detail of the atom.
Atoms mainly contain nucleus, proton, and electron.
Nucleus - It represents the center of the atom.
Electron - It is a negatively charged particle.
Proton - It is a positively charged particle.
Phosphorus is a member of the Nitrogen family. Its atomic number is $15$ , atomic mass is $30.97$ and symbol is $P$.
Firstly, find the molecule in $1$ mole of ${P_4}$ . It contains an Avogadro number that is $6.022 \times {10^{23}}$.
Avogadro number represented by ${N_A}$. Therefore, option c is the correct answer.
As we have seen that $1$ molecule of ${P_4}$ has $4$ atoms.
means, $124g$ of ${P_4}$ contains $4{N_A}$ atom.
So, option b is the correct answer.
Therefore, option 2 is the correct answer.

Note:
There are mainly two types of molecules in chemistry: Heteronuclear and Homonuclear. Molar mass - It is the mass of each sample of the compound. Avogadro Number - The constant number that was given by Amedeo Avogadro. It is used to calculate the molar mass of the substance. Phosphorus used for fertilizer, water softening, bone, teeth enable, nutrition, metal, etc.