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Questions and Answers
What distinguishes one chemical element from another?
What distinguishes one chemical element from another?
- The size of their atoms
- The number of protons in their atoms (correct)
- The number of electrons in their atoms
- The number of neutrons in their atoms
What is the only atom that has no neutron?
What is the only atom that has no neutron?
- Copper
- Protium 1H (correct)
- Carbon
- Sodium
What are atoms with the same number of protons but a different number of neutrons called?
What are atoms with the same number of protons but a different number of neutrons called?
- Isomers
- Isotopes (correct)
- Ions
- Molecules
Why is it not possible to see atoms with conventional microscopes?
Why is it not possible to see atoms with conventional microscopes?
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What makes it not possible to accurately predict the behavior of atoms using classical physics?
What makes it not possible to accurately predict the behavior of atoms using classical physics?
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Study Notes
Elements and Atoms
- The atomic number, which is the number of protons in an atom's nucleus, distinguishes one chemical element from another.
Atomic Structure
- Hydrogen-1 is the only atom that has no neutron.
Isotopes
- Atoms with the same number of protons but a different number of neutrons are called isotopes.
Atomic Observation
- Atoms are not visible with conventional microscopes because they are incredibly small and their size is measured in picometers.
Atomic Behavior
- It is not possible to accurately predict the behavior of atoms using classical physics because they exhibit wave-particle duality and other quantum mechanical properties.
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