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Questions and Answers
How would you determine the overall charge of an atom?
How would you determine the overall charge of an atom?
- Atoms always have an overall positive charge.
- Atoms have no overall charge. (correct)
- By adding the number of protons and electrons.
- By adding the number of protons and neutrons.
If an atom has 7 protons, 8 neutrons, and 7 electrons, what is its atomic number?
If an atom has 7 protons, 8 neutrons, and 7 electrons, what is its atomic number?
- 15
- 7 (correct)
- 22
- 8
What is the relationship between the mass number of an atom and its actual mass?
What is the relationship between the mass number of an atom and its actual mass?
- The higher the mass number, the more mass the atom has. (correct)
- Mass number indicates the charge of the atom.
- The higher the mass number, the less mass the atom has.
- Mass number has no relation to the actual mass of the atom.
How does the number of protons relate to the number of electrons in a neutral atom?
How does the number of protons relate to the number of electrons in a neutral atom?
Who discovered that electrons occupy specific energy levels or shells around the nucleus?
Who discovered that electrons occupy specific energy levels or shells around the nucleus?
What is the maximum number of electrons that can occupy the first electron shell closest to the nucleus?
What is the maximum number of electrons that can occupy the first electron shell closest to the nucleus?
What is the maximum number of electrons that can generally occupy the second and third electron shells?
What is the maximum number of electrons that can generally occupy the second and third electron shells?
If an atom has an electronic structure of 2, 8, what does this indicate about the arrangement of its electrons?
If an atom has an electronic structure of 2, 8, what does this indicate about the arrangement of its electrons?
What is the mass number of a nitrogen atom that has 7 protons and 7 neutrons?
What is the mass number of a nitrogen atom that has 7 protons and 7 neutrons?
How does the number of protons in an atom determine its identity?
How does the number of protons in an atom determine its identity?
Flashcards
Atomic Number
Atomic Number
The number of protons in an atom.
Mass Number
Mass Number
The total number of protons and neutrons in an atom's nucleus.
Protons
Protons
Positively charged particles in the nucleus of an atom.
Electrons
Electrons
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Neutrons
Neutrons
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Electron Shells
Electron Shells
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Electronic Structure
Electronic Structure
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First Electron Shell Capacity
First Electron Shell Capacity
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Second/Third Shell Capacity
Second/Third Shell Capacity
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Study Notes
- Chapter 2.1 focuses on atomic structure and the periodic table
Key Definitions
- Atomic number is the number of protons
- Mass number is the number of protons plus the number of neutrons
- The number of protons equals the number of electrons
Atomic Particles
- Protons have a positive charge
- Electrons have a negative charge
- Neutrons have no charge
- Atoms have no overall charge
Mass Number
- The higher the mass number, the more mass the atom has
- As an example, Hydrogen has an atomic number of 1, while Nitrogen has an atomic mass of 14, thus, one atom of Nitrogen has 14 times more mass than one atom of Hydrogen
Electron Shells
- Niels Bohr discovered that electrons move in different electron shells, also called energy levels
Electronic Structure
- Electronic structure refers to the arrangement of electrons in an atom
- The first electron shell has a maximum of 2 electrons
- Second and third shells can hold a maximum of 8 electrons
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