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Questions and Answers
What are atoms defined as in chemistry?
What are atoms defined as in chemistry?
- The smallest particle of a compound that can take part in a chemical reaction
- The smallest particle of matter that cannot take part in a chemical reaction
- The smallest particle of a mixture that can take part in a chemical reaction
- The smallest particle of an element that can take part in a chemical reaction (correct)
Which element has the smallest atomic radius?
Which element has the smallest atomic radius?
- Carbon
- Hydrogen (correct)
- Oxygen
- Nitrogen
In what state do atoms of most elements exist?
In what state do atoms of most elements exist?
- In a gaseous state
- In combination with atoms of the same element or another element (correct)
- In a solid state
- In a free state
What are atoms considered as the building blocks of?
What are atoms considered as the building blocks of?
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Why can atoms not be seen under the most powerful optical microscope?
Why can atoms not be seen under the most powerful optical microscope?
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Study Notes
Definition and Characteristics of Atoms
- Atoms are the fundamental units of matter, serving as the smallest identifiable units that retain the properties of an element.
- They consist of subatomic particles: protons, neutrons, and electrons.
Element with Smallest Atomic Radius
- Helium is the element with the smallest atomic radius, measuring approximately 31 picometers (pm).
States of Atoms
- Atoms of most elements exist in the solid, liquid, or gaseous states, depending on temperature and pressure conditions.
Atoms as Building Blocks
- Atoms are considered the building blocks of molecules and compounds, forming the basis of all chemical substances.
Visibility Limitations of Atoms
- Atoms cannot be observed under the most powerful optical microscope due to their size, which is on the order of picometers, and the limitations of light wavelengths.
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