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Questions and Answers
What is the basic particle of the chemical elements?
What is the basic particle of the chemical elements?
- Neutron
- Photon
- Electron
- Proton (correct)
How are atoms distinguished from each other?
How are atoms distinguished from each other?
- By the number of photons
- By the number of electrons
- By the number of protons (correct)
- By the number of neutrons
What is an isotope?
What is an isotope?
- An atom with a different number of protons and neutrons (correct)
- An atom with the same number of protons but a different number of electrons
- An atom with a different number of electrons and neutrons
- An atom with a different number of electrons and protons
What is the charge of an atom when the numbers of protons and electrons are equal?
What is the charge of an atom when the numbers of protons and electrons are equal?
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What is the approximate size of an atom?
What is the approximate size of an atom?
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Study Notes
Atomic Structure
- The basic particle of chemical elements is an atom.
- Atoms are distinguished from each other by their unique number of protons in the atomic nucleus, known as the atomic number.
Isotopes
- An isotope is a version of an element with a different number of neutrons in the atomic nucleus.
Atomic Charge
- When the number of protons and electrons in an atom are equal, the atom has a neutral charge.
Atomic Size
- The approximate size of an atom is measured in picometers (pm), with most atoms ranging from 25 pm to 500 pm in diameter.
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Test your knowledge about the basic structure of atoms, including the composition of protons, neutrons, and electrons, and how elements are distinguished by their atomic numbers.
