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Chapter 2: Problem 27

What is the difference between an atom and a molecule?

Short Answer

Expert verified
An atom is the smallest unit of an element with the properties of that element, while a molecule is a group of two or more atoms bonded together, which can represent a single element or a compound. In essence, molecules are formed from atoms.

Step by step solution

01

Understanding an Atom

An atom is the smallest unit of an element that maintains the properties of that element. It is made up of subatomic particles, namely positive protons and neutral neutrons in the nucleus, with negative electrons orbiting this nucleus.
02

Understanding a Molecule

A molecule, on the other hand, is formed when two or more atoms join together chemically. It is the smallest unit of a compound that maintains the properties of that compound. It may consist of atoms of the same element, for example, an oxygen molecule (O2), or atoms of different elements, for example, a water molecule (H2O).
03

Delineating the Differences

The main difference lies in the fact that an atom is the most basic unit that makes up matter, while a molecule is a group of two or more atoms bonded together. A molecule can be made up of atoms of the same element or different elements.

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Most popular questions from this chapter

Compare the properties of the following: \(\alpha\) particles, cathode rays, protons, neutrons, electrons.

What is meant by the term "fundamental particle"?

Write the appropriate symbol for each of the following isotopes: (a) \(Z=11, A=23\) (b) \(Z=28, A=64\).

Indicate the number of protons, neutrons, and electrons in each of the following species: $$ { }_{7}^{15} \mathrm{~N},{ }_{16}^{33} \mathrm{~S},{ }_{29}^{63} \mathrm{Cu},{ }_{38}^{84} \mathrm{Sr},{ }_{56}^{130} \mathrm{Ba},{ }_{74}^{186} \mathrm{~W},{ }_{80}^{202} \mathrm{Hg} $$

Describe the two commonly used molecular models.
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