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Questions and Answers
Which subatomic particle is responsible for the atom's overall charge?
Which subatomic particle is responsible for the atom's overall charge?
- Protons (correct)
- Neutrons
- Electrons
- None of the above
What is the difference between an atom and an ion?
What is the difference between an atom and an ion?
- Ions are larger than atoms.
- Ions have a different number of neutrons than atoms.
- Ions have a different number of protons than atoms.
- Ions have a different number of electrons than atoms. (correct)
What is the maximum number of electrons that can occupy the second energy level of an atom?
What is the maximum number of electrons that can occupy the second energy level of an atom?
- 2
- 4
- 8 (correct)
- 16
What is the mass of an atom primarily determined by?
What is the mass of an atom primarily determined by?
Flashcards
Atom
Atom
The smallest unit of an element, containing protons, neutrons, and electrons.
Proton
Proton
A subatomic particle with a mass of 1 a.m.u. and a charge of +1, found in the nucleus.
Neutron
Neutron
A subatomic particle with a mass of 1 a.m.u. and no charge, found in the nucleus.
Electron
Electron
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Isotope
Isotope
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Study Notes
Atomic Structure
- Atoms are the smallest part of an element.
- Atoms are composed of three subatomic particles: protons, neutrons, and electrons
- Protons have a mass of 1 a.m.u. and a positive charge (+1); they are located in the nucleus
- Neutrons have a mass of 1 a.m.u. and no charge; they are located in the nucleus.
- Electrons have a mass of 1/1836 a.m.u. and a negative charge (-1); they are found in the electron cloud surrounding the nucleus.
- Atoms of the same element have the same number of protons in the nucleus
- Ions are charged atoms that have lost or gained electrons.
- Isotopes are atoms of the same element with a different number of neutrons.
Bohr Model
- The Bohr model arranges electrons in energy levels:
- The first energy level can hold 2 electrons
- The second and third energy levels can hold 8 electrons each.
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