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This chart shows four atoms, labeled [tex]\( W, X, Y, \)[/tex] and [tex]\( Z \)[/tex]. These atoms can combine with each other to form molecules.

\begin{tabular}{|c|c|}
\hline
Atom & Element \\
\hline
[tex]$W$[/tex] & Oxygen \\
\hline
[tex]$X$[/tex] & Hydrogen \\
\hline
[tex]$Y$[/tex] & Carbon \\
\hline
[tex]$Z$[/tex] & Oxygen \\
\hline
\end{tabular}

Which combination of atoms will form a molecule, but not a compound?

A. [tex]\( W \)[/tex] and [tex]\( X \)[/tex]
B. [tex]\( X \)[/tex] and [tex]\( Y \)[/tex]
C. [tex]\( W \)[/tex] and [tex]\( Z \)[/tex]
D. [tex]\( Y \)[/tex] and [tex]\( Z \)[/tex]


Sagot :

To determine which combination of atoms will form a molecule but not a compound, let's first recall the difference between a molecule and a compound:

- Molecule: A molecule is formed when two or more atoms are chemically bonded together.
- Compound: A compound is a type of molecule that consists of atoms of different elements. Therefore, if the molecule consists of atoms of the same element, it is not a compound.

Given the chart:
[tex]\[ \begin{tabular}{|c|c|} \hline Atom & Element \\ \hline$W$ & oxygen \\ \hline$X$ & hydrogen \\ \hline$Y$ & carbon \\ \hline$Z$ & oxygen \\ \hline \end{tabular} \][/tex]

Let's examine each given combination:

1. [tex]$W$[/tex] and [tex]$X$[/tex]
- Elements: Oxygen (W) and Hydrogen (X)
- These are different elements, so this combination forms a compound.

2. [tex]$X$[/tex] and [tex]$Y$[/tex]
- Elements: Hydrogen (X) and Carbon (Y)
- These are different elements, so this combination forms a compound.

3. [tex]$W$[/tex] and [tex]$Z$[/tex]
- Elements: Oxygen (W) and Oxygen (Z)
- These are the same element, so this combination forms a molecule that is not a compound.

4. [tex]$Y$[/tex] and [tex]$Z$[/tex]
- Elements: Carbon (Y) and Oxygen (Z)
- These are different elements, so this combination forms a compound.

From this examination, we can see that the combination of atoms that will form a molecule, but not a compound, is:

[tex]\[ \boxed{W \text{ and } Z} \][/tex]
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