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Questions and Answers
What does the atomic number represent?
What does the atomic number represent?
Number of protons
What does the mass number represent?
What does the mass number represent?
Number of protons and neutrons combined
Explain what a group and a period represent on the periodic table.
Explain what a group and a period represent on the periodic table.
Period: number of shells; Group: number of electrons in the last shell
How would you figure the number of protons or electrons in an atom?
How would you figure the number of protons or electrons in an atom?
What is the charge of a proton?
What is the charge of a proton?
Where would you find a proton in an atom?
Where would you find a proton in an atom?
Where would you find an electron in an atom?
Where would you find an electron in an atom?
What is the charge of a neutron?
What is the charge of a neutron?
Where would you find a neutron in an atom?
Where would you find a neutron in an atom?
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Study Notes
Atomic Number and Mass Number
- The atomic number indicates the number of protons in an atom.
- The mass number is the total count of protons and neutrons in the nucleus.
Periodic Table Structure
- A period on the periodic table corresponds to the number of electron shells an element has.
- A group indicates the number of electrons in the outermost shell, which influences chemical properties.
Protons and Electrons
- The atomic number is essential for determining the number of protons and, in a neutral atom, the number of electrons.
- Protons carry a positive charge, while electrons carry a negative charge.
Atomic Composition
- Protons are located in the nucleus of an atom.
- Electrons are found in shells surrounding the nucleus.
- Neutrons, which are neutral in charge, are also located in the nucleus.
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