Atomic structure

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What is in an atom?
Central nucleus; composed of protons and neutrons, surrounded by electrons, orbiting in shells
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What is the relative mass and charge of a proton?
Relative mass = 1. Relative Charge = +1
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What is the relative mass and charge of a neutron?
Relative mass = 1. Relative Charge = 0
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What is the relative mass and charge of an electron?
Relative mass = 1/1836. Relative Charge = -1
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What does the atomic number represent?
The number of protons in the nucleus of an atom
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What is does the mass number represent?
The number of protons and neutrons in an atom
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What is an isotope?
An atom with the normal number of protons and electrons, but a different number of protons; they have the same atomic number but a different mass number
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What is the relative atomic mass?
The weighted mean mass of an atom of an element relative to one-twelfth the mass of an atom of carbon -12
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How can we calculate the relative atomic mass of an element from the abundances of its isotope?
Multiply the percentage, belong to the element, by it's atomic number, add the results together and then divide the answer by 100
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How is the Periodic Table arranged?
By order of atomic number
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Card 2

Front

What is the relative mass and charge of a proton?

Back

Relative mass = 1. Relative Charge = +1

Card 3

Front

What is the relative mass and charge of a neutron?

Back

Preview of the front of card 3

Card 4

Front

What is the relative mass and charge of an electron?

Back

Preview of the front of card 4

Card 5

Front

What does the atomic number represent?

Back

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