-Proton: charge +1 mass 1 -Neutron: charge 0 mass 1 -Electron: charge -1 mass 1/840
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What is the mass number?
The mass number is the total number of protons and neutrons in an atom. It is the top number
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What is the atomic number?
The atomic number is the number of protons in an atom. It is the bottom number
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What is the electrical charge on an atom?
0 because the no. of protons equals the no. of electrons
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How many electrons in each shell?
First shell-2 Second shell-8 Third shell-8
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What are the 2 ways to represent the atomic structure?
1. Dot and Cross diagrams 2. Electronic Configuration
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What are isotopes?
Isotopes are atoms of the same element which have the same atomic number but a different mass number. This means they have the same no. of protons but a different no. of neutrons
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Why do isotopes of the same element have the same chemical properties?
The number of protons and electrons will stay the same
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How do you calculate the average mass/relative atomic mass of an element?
(Mass x abundance of isotope A) + (Mass x abundance of isotope B) / (Total abundance of isotope A + isotope B)
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How do you calaulate relative atomic mass?
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Other cards in this set
Card 2
Front
What is the mass number?
Back
The mass number is the total number of protons and neutrons in an atom. It is the top number
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