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Questions and Answers
What defines the isotope of an element?
What defines the isotope of an element?
- The number of neutrons in the atom (correct)
- The number of protons in the atom
- The size of the nucleus
- The number of electrons in the atom
What distinguishes one chemical element from another?
What distinguishes one chemical element from another?
- The size of their nucleus
- The number of neutrons in their atoms
- The number of protons in their atoms (correct)
- The number of electrons in their atoms
Why is it not possible to see atoms with conventional microscopes?
Why is it not possible to see atoms with conventional microscopes?
- They are transparent to visible light
- Their size is smaller than the shortest wavelength of visible light (correct)
- They are constantly moving
- They are not composed of light-reflecting materials
What makes accurately predicting the behavior of atoms using classical physics not possible?
What makes accurately predicting the behavior of atoms using classical physics not possible?
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Where is most of an atom's mass located?
Where is most of an atom's mass located?
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Study Notes
Atoms and Elements
- The isotope of an element is defined by the number of neutrons present in the atom's nucleus.
- Chemical elements are distinguished from one another by the number of protons present in the atomic nucleus, which is known as the atomic number.
- Atoms are too small to be visible with conventional microscopes due to the limited resolving power of light.
- It is not possible to accurately predict the behavior of atoms using classical physics because atoms do not follow classical physics rules, but rather exhibit wave-particle duality and uncertainty principle.
- Most of an atom's mass is located in the nucleus, which consists of protons and neutrons, with the electrons having negligible mass.
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