Question

WHAT ARE THE THREE ELEMENTS AND THE 3 NUMBERS OF ATOMS??? PLEASE TELL ME HOW TO DO IT ALSO!!!!!!!

Answer 1

Answer:

The table is as follows :-

                                $\begin{tabular}{|c|c|} \cline{1-2} \multicolumn{2}{|c|}{2NaOH} \\ \cline{1-2} \multicolumn{1}{|c|}{Element} & \multicolumn{1}{c|}{Number of atoms} \\ \cline{1-2} Sodium\: (Na)& 2 \\&\\ Oxygen \:(O) & 2 \\&\\Hydrogen\:(H) & 2 \\&\\ \cline{1-2}& \\Total & 6 \\\cline{1-2}\end{tabular}$

                                                                                                                           

In 1 molecule of NaOH, there are 3 atoms in total 1 of each element. A subscript present in front of an element in its molecular formula denotes the number of atoms of that type in the compound.

[For example :-

In $H_{2}O$, the subscript in front of H is 2 so there are 2 atoms of Hydrogen and since there is no subscript in front of O the number of atoms of Oxygen is taken as 1. ]

• In NaOH there is no subscript present in front of any element so the number of atoms of each element in 1 molecule of NaOH will be 1 .

In the question, 2 molecules of NaOH are given

=> no. of molecules can be known by seeing if there is any numeral prefix in front of the molecular formula of the compound

[For example :-

2Na denotes 2 molecules of Sodium(Na).]

• So, there are 2 molecules of NaOH given, atoms of elements in 1 molecule of NaOH is 1

=> In 2 molecules, no. of atoms of each element = 2 x 1 = 2

So the no. of atoms of each element in 2NaOH is 2

Thus, total number of atoms = 6

(∵ as there are 3 different elements and 2 atoms of each type => 2 x 3 = 6)

Answer 2

"Na 2

O 2

H 2

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